Overland Storage SnapScale Service manual

Overland
Storage
SnapScale™
Administrator’s Guide
For a Clustered Network Running
RAINcloudOS™Version 4.0
December 2013
10400455-001

Overland Storage, Inc.
9112 Spectrum Center Blvd.
San Diego, CA 92123
U.S.A.
Tel: [phone] (toll-free U.S.)
Tel: [phone], Option 5 (International)
Fax: [phone] (general)
Fax: [phone] (sales)
www.overlandstorage.com
SnapScale/RAINcloudOS 4.0 Administrator’s Guide
10400455-001 December 2013 Dec 2013 ©Overland Storage, Inc. ii
Dec 2013 ©Overland Storage, Inc. All rights reserved.
Overland®, Overland Data®, Overland Storage®, ARCvault®, DynamicRAID®, LibraryPro®, LoaderXpress®, Multi-SitePAC®, NEO®, NEO Series®,
PowerLoader®, Protection OS®, REO®, REO 4000®, REO Series®, Snap Appliance®, Snap Care® (EU only), SnapServer®, StorAssure®, Ultamus®, VR2®,
and XchangeNOW®are registered trademarks of Overland Storage, Inc.
GuardianOS™, RAINcloud™, RapidRebuild™, SnapDisk™, SnapEDR™, Snap Enterprise Data Replicator™, SnapExpansion™, SnapSAN™,
SnapScale™, SnapServer DX Series™, SnapServer Manager™, and SnapWrite™ are trademarks of Overland Storage, Inc.
All other brand names or trademarks are the property of their respective owners.
The names of companies and individuals used in examples are fictitious and intended to illustrate the use of the software. Any resemblance to actual
companies or individuals, whether past or present, is coincidental.
PROPRIETARY NOTICE
All information contained in or disclosed by this document is considered proprietary by Overland Storage. By accepting this material the recipient agrees
that this material and the information contained therein are held in confidence and in trust and will not be used, reproduced in whole or in part, nor its
contents revealed to others, except to meet the purpose for which it was delivered. It is understood that no right is conveyed to reproduce or have
reproduced any item herein disclosed without express permission from Overland Storage.
Overland Storage provides this manual as is, without warranty of any kind, either expressed or implied, including, but not limited to, the implied
warranties of merchantability and fitness for a particular purpose. Overland Storage may make improvements or changes in the product(s) or programs
described in this manual at any time. These changes will be incorporated in new editions of this publication.
Overland Storage assumes no responsibility for the accuracy, completeness, sufficiency, or usefulness of this manual, nor for any problem that might arise
from the use of the information in this manual.
FW 4.0.061

10400455-001 Dec 2013 ©Overland Storage, Inc. iii
Preface
Audience and Purpose
This guide is intended for system and network administrators charged with installing and
maintaining a SnapScale cluster running RAINcloudOS 4.0 on their network. It provides
information on the installation, configuration, security, and maintenance of the SnapScale
cluster and nodes.
Product Documentation
SnapScale product documentation and additional literature are available online, along with
the latest release of the RAINcloudOS 4.0 software.
Point your browser to:
http://docs.overlandstorage.com/snapscale
Follow the appropriate link on that page to download the latest software file or document.
For additional assistance, search at http://support.overlandstorage.com.
Overland Technical Support
For help configuring and using your SnapScale cluster, email our technical support staff at:
[email protected].
You can get additional technical support information on the Contact Us web page at:
http://docs.overlandstorage.com/support
For a complete list of support times based on your type of coverage, visit our website at:
http://docs.overlandstorage.com/care
Software Updates
The latest release of the RAINcloudOS software can be obtained from the Downloads and
Resources (SnapScale Solutions) page at the Overland Storage website:
http://docs.overlandstorage.com/snapscale
Follow the appropriate instructions to download the latest software file.
For additional assistance, search at http://support.overlandstorage.com/.

SnapScale/RAINcloudOS 4.0 Administrator’s Guide Preface
10400455-001 Dec 2013 ©Overland Storage, Inc. iv
Conventions
This document exercises several alerts and typographical conventions.
Alerts
Typographical Conventions
Information contained in this guide has been reviewed for accuracy, but not for product
warranty because of the various environments, operating systems, or settings involved.
Information and specifications may change without notice.
Japanese Voluntary Control Council for Interference (VCCI)
Convention Description & Usage
IMPORTANT An Important note is a type of note that provides information essential to
the completion of a task or that can impact the product and its function.
CAUTION A Caution contains information that the user needs to know to avoid
damaging or permanently deleting data or causing physical damage to
the hardware or system.
WARNING
ADVERTISSEMENT
A Warning contains information concerning personal safety. Failure to
follow directions in the warning could result in bodily harm or death.
Un Canadien avertissement comme celui-ci contient des informations
relatives à la sécurité personnelle. Ignorer les instructions dans
l'avertissement peut entraîner des lésions corporelles ou la mort.
Convention Description & Usage
Button_name Words in this special boldface font indicate the names of command
buttons found in the Web Management Interface.
Ctrl-Alt-r This type of format details the keys you press simultaneously. In this
example, hold down the Ctrl and Alt keys and press the r key.
NOTE A Note indicates neutral or positive information that emphasizes or
supplements important points of the main text. A note supplies
information that may apply only in special cases, for example, memory
limitations or details that apply to specific program versions.
Menu Flow
Indicator (>)
Words with a greater than sign between them indicate the flow of actions
to accomplish a task. For example, Setup > Passwords > User
indicates that you should press the Setup button, then the Passwords
button, and finally the User button to accomplish a task.
Courier Italic A variable for which you must substitute a value.
Courier Bold Commands you enter in a command-line interface (CLI).

10400455-001 Dec 2013 ©Overland Storage, Inc. v
Contents
Preface
Chapter 1 - Overview
SnapScale Conventions ......................................................................................................................................1-1
SnapScale Node Requirements ..........................................................................................................................1-2
RAINcloudOS Specifications ...............................................................................................................................1-3
RAINcloudOS 4.0 Features ...................................................................................................................................1-4
Client and Storage Networks ..............................................................................................................................1-5
Node/Switch Cabling Example .....................................................................................................................1-5
Node Port Configurations ....................................................................................................................................1-6
X2 Node Configurations .................................................................................................................................1-6
X4 Node Configurations .................................................................................................................................1-7
Chapter 2 - Setup and Configuration
Connecting for the First Time ..............................................................................................................................2-1
Connect Using the Node Name ...................................................................................................................2-1
Connect Using SSM .........................................................................................................................................2-2
Create a New SnapScale Cluster (via Wizard) .................................................................................................2-3
Step 1 – Select SnapScale Nodes .................................................................................................................2-3
Step 2 – Client Network Configuration Overview .......................................................................................2-5
Step 3 – Choose Client Network Static TCP/IP Settings ..............................................................................2-5
Step 4 – Configure Node Static IP Addresses ..............................................................................................2-6
Step 5 – Basic SnapScale Properties .............................................................................................................2-7
Step 6 – Set Date and Time ...........................................................................................................................2-8
Step 7 – Summary Verification & Cluster Creation .....................................................................................2-9
Join an Existing SnapScale Cluster (via Wizard) ..............................................................................................2-12
Web Management Interface ...........................................................................................................................2-13
Alert Messages ..............................................................................................................................................2-15
Site Map .........................................................................................................................................................2-16
Contact Information ....................................................................................................................................2-17
Chapter 3 - SnapScale Settings
SnapScale Properties ...........................................................................................................................................3-2
Date/Time ..............................................................................................................................................................3-3
Configure Date and Time Settings Manually ...............................................................................................3-3
Configure Date and Time Settings for Automatic Synchronization ..........................................................3-4
SSH ..........................................................................................................................................................................3-5
UPS ..........................................................................................................................................................................3-5
Edit UPS Properties ..........................................................................................................................................3-6
Procedure to Configure UPS Protection .......................................................................................................3-7
Add Network UPS Device ..............................................................................................................................3-7

SnapScale/RAINcloudOS 4.0 Administrator’s Guide Contents
10400455-001 Dec 2013 ©Overland Storage, Inc. vi
Change Network UPS Device .......................................................................................................................3-8
Delete Network UPS Device ..........................................................................................................................3-8
Chapter 4 - Network Access
View Network Information ...................................................................................................................................4-2
Client Network Information ............................................................................................................................4-2
Storage Network Information ........................................................................................................................4-4
TCP/IP Networking ................................................................................................................................................4-5
Bonding Options .............................................................................................................................................4-6
Guidelines in TCP/IP Configuration ...............................................................................................................4-7
Edit Storage Network Properties ...................................................................................................................4-8
Utility IP Address ..............................................................................................................................................4-9
Windows/SMB Networking .................................................................................................................................4-10
Support for Windows/SMB Networking .......................................................................................................4-11
Support for Windows Network Authentication ..........................................................................................4-12
Connect from a Windows Client ...............................................................................................................4-13
Connect a Mac OS X Client Using SMB .....................................................................................................4-13
Configure Windows/SMB Networking .........................................................................................................4-13
NFS Access ..........................................................................................................................................................4-16
Support for NFS ..............................................................................................................................................4-17
NFS Share Mounting .....................................................................................................................................4-17
NIS Domains ........................................................................................................................................................4-18
Guidelines for Configuring NIS .....................................................................................................................4-18
FTP/FTPS Access ..................................................................................................................................................4-19
Supported FTP Clients ...................................................................................................................................4-19
SNMP Configuration ...........................................................................................................................................4-20
Default Traps .................................................................................................................................................4-21
Supported Network Manager Applications and MIBs .............................................................................4-22
Configure SNMP ............................................................................................................................................4-22
Web Access ........................................................................................................................................................4-23
Configuring HTTP/HTTPS ................................................................................................................................4-23
Using Web Root to Configure the SnapScale as a Simple Web Server ..................................................4-24
iSNS Configuration ..............................................................................................................................................4-27
Chapter 5 - Storage Options
Peer Sets ................................................................................................................................................................5-1
Peer Sets and Recovery .................................................................................................................................5-2
Peer Set Utilization ...........................................................................................................................................5-4
Peer Set Basics .................................................................................................................................................5-4
Peer Sets Page ................................................................................................................................................5-5
Spare Disks Page .............................................................................................................................................5-6
Spare Distributor ..............................................................................................................................................5-7
Data Balancer .................................................................................................................................................5-9
Volumes ...............................................................................................................................................................5-11
Volume Overview .........................................................................................................................................5-11
Creating Volumes .........................................................................................................................................5-12
Edit Volume Properties .................................................................................................................................5-14
Deleting Volumes ..........................................................................................................................................5-14
Quotas .................................................................................................................................................................5-15
Default Quotas ..............................................................................................................................................5-16
Quotas for Volume Page .............................................................................................................................5-17

SnapScale/RAINcloudOS 4.0 Administrator’s Guide Contents
10400455-001 Dec 2013 ©Overland Storage, Inc. vii
Add Quota Wizard .......................................................................................................................................5-18
Editing or Removing Quotas ........................................................................................................................5-20
Snapshots ............................................................................................................................................................5-21
Snapshots Overview .....................................................................................................................................5-22
Creating Snapshots ......................................................................................................................................5-22
Adjusting Snapshot Space ...........................................................................................................................5-25
Accessing Snapshots ....................................................................................................................................5-26
Scheduling Snapshots ..................................................................................................................................5-26
Edit Snapshot Properties ...............................................................................................................................5-27
iSCSI Disks .............................................................................................................................................................5-27
Configuring iSCSI Initiators ...........................................................................................................................5-27
iSCSI Configuration on the SnapScale .......................................................................................................5-27
Create iSCSI Disks ..........................................................................................................................................5-29
Edit iSCSI Disk Properties ...............................................................................................................................5-31
Delete an iSCSI Disk ......................................................................................................................................5-32
Configuring VSS/VDS for iSCSI Disks ............................................................................................................5-32
Nodes ...................................................................................................................................................................5-35
Nodes Overview ...........................................................................................................................................5-35
Edit Node Properties .....................................................................................................................................5-36
Node Drives ...................................................................................................................................................5-36
Adding Nodes ...............................................................................................................................................5-37
Removing Nodes ..........................................................................................................................................5-41
Node Identification ......................................................................................................................................5-42
Disks ......................................................................................................................................................................5-43
Replacing Drives ...........................................................................................................................................5-43
Adding Drives ................................................................................................................................................5-44
Chapter 6 - Security Options
Overview ...............................................................................................................................................................6-1
Guidelines for Local Authentication .............................................................................................................6-2
User and Group ID Assignments ....................................................................................................................6-3
Security Guides .....................................................................................................................................................6-3
Windows Active Directory Security Guide ...................................................................................................6-4
Entire Volume Security Guide ........................................................................................................................6-5
Folder on Volume Security Guide .................................................................................................................6-5
Shares .....................................................................................................................................................................6-5
Share Security Overview ................................................................................................................................6-6
Create Shares ..................................................................................................................................................6-6
Edit Share Properties .......................................................................................................................................6-8
Delete Shares ..................................................................................................................................................6-9
Configuring Share Access .............................................................................................................................6-9
Local Users ...........................................................................................................................................................6-16
Create a User ................................................................................................................................................6-16
Edit User Properties .......................................................................................................................................6-17
Local User Password Policies .......................................................................................................................6-19
Assign User to Group ....................................................................................................................................6-20
Delete Local User ..........................................................................................................................................6-21
Local Groups .......................................................................................................................................................6-22
Create New Group .......................................................................................................................................6-22
Edit Group Properties ...................................................................................................................................6-23
Specify Users in Group ..................................................................................................................................6-24

SnapScale/RAINcloudOS 4.0 Administrator’s Guide Contents
10400455-001 Dec 2013 ©Overland Storage, Inc. viii
Delete Group ................................................................................................................................................6-24
Security Models ...................................................................................................................................................6-25
Managing Volume Security Models ...........................................................................................................6-25
ID Mapping .........................................................................................................................................................6-25
Add Mapping ................................................................................................................................................6-26
Change Mapping .........................................................................................................................................6-29
Auto Mapping ...............................................................................................................................................6-31
Remove Mappings .......................................................................................................................................6-33
Remove Missing ID Mappings .....................................................................................................................6-36
Filesystem Updates .......................................................................................................................................6-37
Home Directories ................................................................................................................................................6-37
Configure Home Directories ........................................................................................................................6-38
Chapter 7 - System Monitoring
System Status .........................................................................................................................................................7-2
SnapScale Status ............................................................................................................................................7-2
Activity ...................................................................................................................................................................7-3
Active Users .....................................................................................................................................................7-3
Open Files ........................................................................................................................................................7-4
Network Monitor .............................................................................................................................................7-4
Event Log ...............................................................................................................................................................7-7
Filter the Log ....................................................................................................................................................7-7
Protocol Manager ................................................................................................................................................7-8
SnapScale Settings ...............................................................................................................................................7-9
Tape .....................................................................................................................................................................7-11
Chapter 8 - Maintenance
Shutdown and Restart .........................................................................................................................................8-2
Manually Powering Nodes On and Off ........................................................................................................8-2
Data Import ...........................................................................................................................................................8-2
Setting Up a Data Import Job .......................................................................................................................8-4
Stopping an Import Job .................................................................................................................................8-6
Recreating an Import Job .............................................................................................................................8-6
Preserving Permissions ....................................................................................................................................8-6
OS Update .............................................................................................................................................................8-7
Update the RAINcloudOS Software .............................................................................................................8-8
Software Update Notification .......................................................................................................................8-8
Configuring Update Notification ..................................................................................................................8-9
Manually Checking for Updates ...................................................................................................................8-9
Support ..................................................................................................................................................................8-9
Phone Home Support ...................................................................................................................................8-10
Registering Your Cluster ...............................................................................................................................8-12
Tools ......................................................................................................................................................................8-13
Email Notification ..........................................................................................................................................8-14
Host File Editor ...............................................................................................................................................8-15
Delete SnapScale Cluster ............................................................................................................................8-16
Chapter 9 - Misc. Options
Home Pages – Web/Admin .................................................................................................................................9-1
Web Home ......................................................................................................................................................9-2
Administration .................................................................................................................................................9-3

SnapScale/RAINcloudOS 4.0 Administrator’s Guide Contents
10400455-001 Dec 2013 ©Overland Storage, Inc. ix
SnapExtensions ......................................................................................................................................................9-5
Snap EDR .........................................................................................................................................................9-5
Snap Finder ...........................................................................................................................................................9-6
Edit Snap Finder Properties ............................................................................................................................9-7
Change Password ................................................................................................................................................9-8
Changing Your Password ...............................................................................................................................9-8
Management Interface Settings ........................................................................................................................9-9
Appendix A - Backup Solutions
Backup and Replication Solutions ..................................................................................................................... A-1
Snap Enterprise Data Replicator ....................................................................................................................... A-1
Snap EDR Usage ............................................................................................................................................ A-2
Configuring Snap EDR for RAINcloudOS ..................................................................................................... A-2
Scheduling Jobs in Snap EDR ....................................................................................................................... A-3
Backup via SMB or NFS ........................................................................................................................................ A-3
Backup via Agent or Media Server ................................................................................................................... A-3
Utility IP Address ............................................................................................................................................. A-3
Appendix B - Security and Access
Security Model Rules ............................................................................................................................................B-1
Security Model Management .............................................................................................................................B-2
Special Share Options ..........................................................................................................................................B-2
Hiding Shares ...................................................................................................................................................B-2
Where to Place Shares ...................................................................................................................................B-3
File and Share Access ..........................................................................................................................................B-3
Cumulative Share Permissions .......................................................................................................................B-3
Snapshot Shares and On Demand File Recovery .......................................................................................B-3
Creating a Snapshot Share ...........................................................................................................................B-3
File-level Security ..................................................................................................................................................B-4
Security Personalities and Security Models ..................................................................................................B-4
Windows ACLs .................................................................................................................................................B-4
Appendix C - RAINcloudOS Ports
Appendix D - Troubleshooting
LED Indicators ....................................................................................................................................................... D-1
SnapScale X2 Node LEDs .............................................................................................................................. D-1
SnapScale X4 Node LEDs .............................................................................................................................. D-3
Network Reset ...................................................................................................................................................... D-3
Master Glossary & Acronym List
Index

10400455-001 Dec 2013 ©Overland Storage, Inc. 1-1
Chapter 1
Overview
SnapScale is a flexible, scalable, low-maintenance network-attached storage cluster
composed of a redundant array of independent nodes running RAINcloudOS. This guide
applies to SnapScale nodes running RAINcloudOS version 4.0.
Offering user-selectable levels of data redundancy, SnapScale uses File-level Striping to
write data across multiple nodes and drives simultaneously for instant protection and high
availability. With a SnapScale cluster, volumes can be configured, created, provisioned, and
grown on demand. Special features such as Data Balancer redistributes files to optimize
performance and Spare Distributor evenly distributes spare drives across nodes. Files can be
accessed either through NFS or CIFS/SMB protocols. SnapScale Flexible Volumes
automatically adjust capacity so they only occupy as much space as their data requires.
Topics in Overview:
•SnapScale Conventions
•SnapScale Node Requirements
•RAINcloudOS Specifications
•RAINcloudOS 4.0 Features
•Client and Storage Networks
•Node Port Configurations
SnapScale Conventions
The SnapScale cluster supports three or more nodes hosting redundant sets of data for data
protection. An Administrator can configure, add, or remove nodes on demand to change
storage requirements. The overall storage system is able to easily grow from three nodes to
meet your needs.
Peer sets are created using two or three drives (based on redundancy choices) located on
different nodes. Each peer set member has the same data and metadata as its peers.

SnapScale/RAINcloudOS 4.0 Administrator’s Guide SnapScale Node Requirements
10400455-001 Dec 2013 ©Overland Storage, Inc. 1-2
There are three different states for SnapScale nodes:
•Uninitialized node – an independent node that has not yet been joined to a
SnapScale cluster.
•SnapScale node – a healthy node that is a member of a fully-configured SnapScale
cluster. Both 2U nodes with up to 12 drives and 4U nodes with 36 drives are available.
•Management node – a SnapScale node with special duties involved in managing the
cluster. The Management node is selected automatically by the RAINcloudOS when
the cluster boots. Should that management node fail, another currently available node
is automatically chosen to become the new Management node. This Management node
also hosts peer sets with metadata and data just like all other SnapScale nodes.
Other key concepts include:
•Management IP – the IP address through which the administrator accesses the Web
Management Interface of the current Management node.
•Peer set – a set of two or three disks (each on a separate node) that have mirrored
data for redundancy.
•Cluster Name – the name visible to network clients and used to connect to the cluster
(similar to a server name), and resolvable to node IP addresses via round robin DNS.
•Cluster Management Name – the hostname resolvable to the Management IP for
Web Management Interface access or Snap EDR configuration.
•Data Replication Count – an administrator-specified, cluster-wide count of the
number of mirrored copies of data within the cluster. The Data Replication Count can
be either “2” or “3” and determines the number of drives in a peer set.
A SnapScale cluster consists of two separate networks:
•Client Network – used exclusively for client access. Clients can connect to any node
to access data anywhere on the cluster.
•Storage Network – an isolated network used exclusively by the cluster for inter-node
communications. This includes:
•Heartbeat (node health/presence) sensing.
•Synchronization of peer set members.
•Data transfer between nodes to facilitate clients reading from and writing to files.
SnapScale Node Requirements
The following table details the basic requirements for cluster nodes:
Requirement Detailed Description
Minimum number of nodes A SnapScale cluster must have a minimum of three (3) nodes to
operate normally.
No expansion units A SnapScale node cannot have any expansion units attached to it.
Minimum number of disks per
node
Each node must have a minimum of four disks. Additional disks can be
added as needed.
Maximum size of file on cluster While the system reports total free space across the entire cluster, the
maximum file size at any given time is dictated by free space on the
least-utilized peer set. This is reported in the Web Management
Interface.

SnapScale/RAINcloudOS 4.0 Administrator’s Guide RAINcloudOS Specifications
10400455-001 Dec 2013 ©Overland Storage, Inc. 1-3
RAINcloudOS Specifications
These specifications apply to all SnapScale nodes running RAINcloudOS 4.0:
Common Storage network To form or join a SnapScale cluster, each Uninitialized node must be
connected to the same Storage network as the other nodes.
Storage network links To form or join a SnapScale cluster each Uninitialized node must have
connectivity (active link) on both Storage network ports.
Storage network usage Only a single cluster can use a given Storage network.
Client network separate from
Storage network
The Client and Storage networks must be on different (independent)
networks, and the Storage network must be isolated from all other
networks.
Nodes must be running same
RAINcloudOS version
To form a SnapScale cluster, all nodes must be running the same
version of RAINcloudOS.
To join an already configured SnapScale cluster, an Uninitialized node
must have the same version of RAINcloudOS as the other SnapScale
nodes:
• If the Uninitialized node has an older version of the RAINcloudOS,
the Uninitialized node must be upgraded to the later version.
• If the Uninitialized node has a newer version of the RAINcloudOS,
then all SnapScale nodes must be upgraded to the later version.
(The node can be reinstalled with a version matching the cluster if
the hardware supports it.)
Adding nodes When adding nodes to an existing cluster, the number of nodes added
at one time should be at least the same number as the Data
Replication Count. This ensures the new nodes and cluster are
efficiently utilizing increased storage space.
Disk requirements All disks in the cluster must be the same type of disk (such as SAS)
and same rotational speed.
Requirement Detailed Description
Feature Specification
Network Transport Protocols TCP/IP (Transmission Control Protocol/Internet Protocol)
UDP/IP (User Datagram Protocol/Internet Protocol)
Network File Protocols Microsoft Networking (CIFS/SMB)
UNIX Network Filesystem (NFS) 3.0 only
Hypertext Transfer Protocol (HTTP/HTTPS)
Network Security • Microsoft Active Directory Service (ADS) (member server)
• UNIX Network Information Service (NIS)
• File and Folder Access Control List (ACL) Security for Users and
Groups
• Secure Sockets Layer (SSL v2/3) 128-bit Encryption
• SMTP Authentication and support for email encryption (STARTTLS
and TLS/SSL encryption protocols)

SnapScale/RAINcloudOS 4.0 Administrator’s Guide RAINcloudOS 4.0 Features
10400455-001 Dec 2013 ©Overland Storage, Inc. 1-4
RAINcloudOS 4.0 Features
NOTE: For details and descriptions of all the new features and a list of other improvements to the
operating system, see the Product Release Notes on the Overland SnapScale website.
With the release of RAINcloudOS 4.0, the following features and functionality are now
available:
Network Client Types Microsoft Windows 2000 SP4/2003/2003 R2/2008 SP2/2008 R2
/XP SP3/Vista SP2/7/8/2012
Mac OS X 10.5/10.6/10.7/10.8 (via CIFS/SMB)
Sun Solaris 10 and 11
HP-UX 11
AIX 5.3/6
Red Hat Enterprise Linux (RHEL) 4.x/5.x/6.x
Novell SuSE Linux Enterprise Server (SLES) 10.x/11.x
Data Protection • Snapshots for immediate or scheduled point-in-time images of the
cluster filesystem
• Support for network backup via CIFS/SMB
• Support for Symantec Backup Exec 2010/2012 and NetBackup 7.5.
• APC®brand Uninterruptible Power Supply (UPS) with Network
Management Cards, a USB interface, or a serial interface (with USB-
to-Serial adapter) are supported for graceful system shutdown
System Management • Browser-based administration tool called the Web Management
Interface
• Read-only CLI support
• Environmental monitoring
• Email event notification
• Data importation (migration)
• SNMP (MIB II and Host Resource MIB)
• User disk quotas for Windows, UNIX/Linux, FTP/FTPS
• NIS Group disk quotas for UNIX/Linux
DHCP Support Only supports Dynamic Host Configuration Protocol (DHCP) in an
Uninitialized node for configuring or adding to a cluster.
Feature Specification
Feature New Functionality
iSCSI Support SnapScale can now create and host iSCSI disk targets on
the cluster file system. These iSCSI disks can register with
an iSNS server, and can also be managed by Windows
VSS/VDS.
SMB2, FTP/FTPS, and SNMP
Support Added
SMB2, FTP/FTPS, and SNMP are all now supported in
RAINcloudOS.
Improved Network Monitoring The Network Monitor page provides additional information
including high-water marks, network activity for the whole
cluster, and clearer labels.
Added User/Group Quotas per
Volume
Storage consumption and file count quotas can now be
configured for users and NIS groups per volume.

SnapScale/RAINcloudOS 4.0 Administrator’s Guide Client and Storage Networks
10400455-001 Dec 2013 ©Overland Storage, Inc. 1-5
Client and Storage Networks
SnapScale requires two separate networks to function correctly: A public network (Client)
and a private network (Storage). To support failover, two Storage network switches must be
connected together (using a 1GbE or 10GbE cable between the switches). Each of the two
Storage network ports on the node need to be connected to a different Storage switch.
Node/Switch Cabling Example
The following example shows three dual 10GbE card X2 nodes and how to connect them to
the network switches. The cables used to connect to the Client side of the network (blue)
originate from the Client 10GbE card in slot 1. Two cables are used to connect both ports of
each node to the Client switch.
The cables used to connect to the Storage side of the network (orange) originate from the
Storage 10GbE card in slot 2. For each node, one cable is used to connect a one Storage port
of each note to one of the two Storage switches used for failover.
For connections between 10GbE cards and 10GbE switches, use either direct-attached
copper cables or fibre cables with SFP+ modules pre-installed in the card and switch ports.
Data Balancer & Spare
Distributor Improved
Data Balancer (formerly Capacity Balancer) redistributes
files to optimize performance. Spare Distributor (formerly
the Spare Disk Balancer) evenly distributes spare drives
across nodes. Both have been improved for faster results.
Feature New Functionality

SnapScale/RAINcloudOS 4.0 Administrator’s Guide Node Port Configurations
10400455-001 Dec 2013 ©Overland Storage, Inc. 1-6
IMPORTANT: If using fibre cables, you must use Overland-approved SFP+ modules. With the
cluster powered OFF, insert the modules into the card and switch ports. Connect the fibre
cable between the two SFP+ modules and restore power to the cluster.
Node Port Configurations
Both the X2 and X4 nodes come in three different configurations: 1GbE ports (both Client
and Storage ports), a single 10GbE card (with 1GbE Client ports), and dual 10GbE cards.
NOTE: If desired, optional 10GbE cards can be added later to upgrade the node.
X2 Node Configurations
Basic 1GbE. At the rear of the X2 node, the 1GbE ports connected directly to the
motherboard are configured to access the Client and Storage networks.
Single 10GbE. The single-card 10GbE configuration uses the two 1GbE ports for the Client
connection and the two 10GbE ports on the card for the Storage connections.
Configuration Node GbE Ports Network Switch
Basic 1GbE X2 Ports 1 & 2 Client (public)
Slot 2 1GbE Card
(ports 3 & 4)
Storage (private)
Configuration Node GbE Ports Network Switch
Single 10GbE X2 Ports 1 & 2 Client (public)
Slot 2 10GbE Card
(ports 3 & 4)
Storage (private)
3
4
1
2Client
Storage
1GbE Card
Client
Storage
10GbE Card
3
4
1
2

SnapScale/RAINcloudOS 4.0 Administrator’s Guide Node Port Configurations
10400455-001 Dec 2013 ©Overland Storage, Inc. 1-7
Dual 10GbE. The dual-card configuration uses the left 10GbE card ports for the Client
connections and the right 10GbE card ports for the Storage connections. The 1GbE ports are
not used.
X4 Node Configurations
Basic 1GbE. At the rear of the 1GbE configuration, there are two sets of 1GbE ports
connected directly to the motherboard for connecting to the switches. The top two are for the
Client network; bottom two for Storage.
Single 10GbE. The single-card 10GbE configuration uses the two 1GbE ports for the Client
connection and the two 10GbE ports on the card for the Storage connections.
Configuration Node GbE Ports Network Switch
Dual 10GbE X2 Slot 1 10GbE Card
(ports 1 & 2)
Client (public)
Slot 2 10GbE Card
(ports 3 & 4)
Storage (private)
Client Storage
10GbE Cards
3
4
1
2
Configuration Node GbE Ports Network Switch
Basic 1GbE X4 Ports 1 & 2 Client (public)
Ports 3 & 4 Storage (private)
Client
Storage
3
4
1
2
Client
Storage
5
6
10GbE Card
3
4
1
2

SnapScale/RAINcloudOS 4.0 Administrator’s Guide Node Port Configurations
10400455-001 Dec 2013 ©Overland Storage, Inc. 1-8
Dual 10GbE. The dual-card configuration uses the left 10GbE card ports for the Client
connections and the right 10GbE card ports for the Storage connections. The 1GbE ports are
not used.
Configuration Node GbE Ports Network Switch
Single 10GbE X4 Ports 1, 2, 3, & 4 Client (public)
Slot 7 10GbE Card
(ports 5 & 6)
Storage (private)
Configuration Node GbE Ports Network Switch
Dual 10GbE X4 Slot 6 10GbE Card
(ports 7 & 8)
Client (public)
Slot 7 10GbE Card
(ports 5 & 6)
Storage (private)
Storage
Client
Unused
10GbE Cards
3
4
1
2
5
6
7
8

10400455-001 Dec 2013 ©Overland Storage, Inc. 2-1
Setup and Configuration
This section covers the initial setup and configuration of an individual SnapScale node
running RAINcloudOS 4.0. It also addresses how to use that node to set up a SnapScale
cluster of three or more nodes, or to add the node to an existing SnapScale cluster.
NOTE: For information concerning the installation and wiring of the SnapScale node hardware,
refer to either the SnapScale X2 Node Quick Start Guide or the SnapScale X4 Node Quick
Start Guide.
Topics in Setup and Configuration:
•Connecting for the First Time
•Create a New SnapScale Cluster (via Wizard)
•Join an Existing SnapScale Cluster (via Wizard)
•Web Management Interface
Connecting for the First Time
NOTE: Uninitialized nodes are configured to acquire their IP address from a DHCP server. If no
DHCP server is found on the network, the node defaults to an IP address in the range of
169.254.xxx.xxx and is labeled in SnapServer Manager (SSM) as “ZeroConf”. You may not
be able to see Uninitialized nodes on your network until you discover them using either the
default node name or the SSM utility and optionally assign them an IP address.
Connect Using the Node Name
This procedure requires that name resolution services (via DNS or an equivalent service) be
operational.
NOTE: Any node that is selected to be part of a cluster can be used to create the cluster.
1. Find the node name of an Uninitialized node that is to be used to create a new
SnapScale cluster.
A SnapScale node name is of the format “Nodennnnnnn,” where nnnnnnn is the node
chassis number. The node number is a unique, numeric-only string that appears on a
label affixed to the bottom of the appliance.
2. In a web browser, enter the URL to connect to the node.
For example, enter “http://Nodennnnnnn” (using the node name).
3. Press Enter to connect to the Web Management Interface.

SnapScale/RAINcloudOS 4.0 Administrator’s Guide Connecting for the First Time
10400455-001 Dec 2013 ©Overland Storage, Inc. 2-2
4. In the login dialog box, enter admin as the user name and admin as the password
(the system defaults), then click OK.
5. Complete the Initial Setup Wizard to either create a new SnapScale cluster or join
an existing cluster.
Connect Using SSM
1. Launch SnapServer Manager (SSM).
SSM discovers all SnapServers, SnapScale clusters, and SnapScale nodes on its local
network segment and displays their names, IP addresses, and other information in the
main console. If you do not have a DHCP server, there might be a delay before the node
appears on the network.
NOTE: To distinguish multiple SnapServers or SnapScale nodes, you may need to find their
default names as explained in Connect Using the Node Name on page 2-1.
2. If using a DHCP server, proceed to Step 3; otherwise, assign an IP address to one of
the nodes to be configured in the cluster.
NOTE: Only one node needs to be configured with an IP address in order to create the cluster.
a. In SSM, right-click the node name.
b. Select Set IP Address.
c. Enter an IP address and a subnet mask, then click OK.
3. In SSM, right-click the node name and select Launch Web Administration.
4. Log into the Web Management Interface.
In the login dialog box, enter admin as the user name and admin as the password
(the system defaults), then click OK.
5. Complete the Initial Setup Wizard to either create a new SnapScale cluster or join
an existing cluster.

SnapScale/RAINcloudOS 4.0 Administrator’s Guide Create a New SnapScale Cluster (via Wizard)
10400455-001 Dec 2013 ©Overland Storage, Inc. 2-3
Create a New SnapScale Cluster (via Wizard)
On a new node, once you log in, the Initial Setup Wizard runs displaying the Welcome page.
From the Initial Setup Wizard, you can use this node to create a new SnapScale cluster by
connecting to two or more other nodes. Click Create a New SnapScale to start the wizard.
The Initial Setup Wizard for creating a new SnapScale cluster consists of seven steps:
Step 1: Select the nodes to be included in the cluster.
Step 2: Review the Client network information.
Step 3: Choose the static TCP/IP settings for the Client network.
Step 4: Populate the Static IP addresses for the nodes.
Step 5: Enter the basic SnapScale properties.
Step 6: Set the date and time.
Step 7: Verify the settings and create a SnapScale cluster.
NOTE: After the cluster is created, you are asked to configure the Administrator’s password as part
of Step 7.
Step 1 – Select SnapScale Nodes
Select the nodes you want to use from the list of eligible nodes.
IMPORTANT: At least three nodes are required to create a SnapScale clustered network. All
nodes must have the identical version of RAINcloudOS (ROS) and be on a subnet that does not
contain an existing cluster. The Client network interfaces for all the nodes must be located on the
same public network subnet, and the Storage network interfaces for all nodes must be located on
the same private Storage network subnet. The nodes cannot have any expansion units attached.