Overland Storage SnapSAN S3000 Service manual

Overland
Storage SnapSAN™Logical Disk
Administrator’s Guide
S3000/S5000
March 2013
10400423-002

10400423-002 03/2013 ©2013 Overland Storage, Inc. ii
SnapSAN Logical Disk Administrator’s Guide
©2013 Overland Storage, Inc. All rights reserved.
Overland®, Overland Data®, Overland Storage®, ARCvault®, DynamicRAID®, GuardianOS® (EU), LibraryPro®, LoaderXpress®, Multi-
SitePAC®, NEO®, NEO Series®, PowerLoader®, Protection OS®, REO®, REO 4000®, REO Series®, Snap Appliance®, Snap Care® (EU),
SnapSAN®, SnapServer®, StorAssure®, Ultamus®, VR2®, and XchangeNOW® are registered trademarks of Overland Storage, Inc.
GuardianOS™, RAINcloud™, RapidRebuild™, SnapDisk™, SnapEDR™, Snap Enterprise Data Replicator™, SnapExpansion™, SnapScale™,
SnapScale X2™, 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.
FM 2.1.1 or 2.2 [reviewers ignore.]

10400423-002 03/2013 ©2013 Overland Storage, Inc. PR-iii
Preface
This user guide explains how to use the SW (Software) Logical Disk Administrator
(hereinafter Logical Disk or LD) to control spare disks in respective servers as a group;
add disks dynamically as required and; to lock configuration changes.
This guide assumes that you are familiar with computer hardware, data storage, and
network administration terminology and tasks. It also assumes you have basic
knowledge of Internet SCSI (iSCSI), Serial-attached SCSI (SAS), Serial ATA (SATA),
Storage Area Network (SAN), and Redundant Array of Independent Disks (RAID)
technology.
This guide assumes that you are familiar with computer hardware, data storage, and
network administration terminology and tasks. It also assumes you have basic
knowledge of Internet SCSI (iSCSI), Serial-attached SCSI (SAS), Serial ATA (SATA),
Storage Area Network (SAN), and Redundant Array of Independent Disks (RAID)
technology.
Product Documentation and Firmware Updates
Overland Storage SnapSAN product documentation and additional literature are
available online, along with the latest release of the SnapSAN 3000/5000 software.
Point your browser to:
http: //docs.overlandstorage.com/snapsan
Follow the appropriate link 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 SnapSAN 3000/5000, search for help at:
http: //support.overlandstorage.com/kb
You can email our technical support staff at [e-mail] or get
additional technical support information on the Contact Us web page:
http: //www.overlandstorage.com/company/contact-us/

SnapSAN S3000/S5000 Logical Disk Administrator’s Guide
10400423-002 03/2013 ©2013 Overland Storage, Inc. PR-iv
For a complete list of support times depending on the type of coverage, visit our web site at:
http: //support.overlandstorage.com/support/overland_care.html
Conventions
This user guide exercises several 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.
Convention Description & Usage
Boldface Words in a boldface font (Example) indicate items to select such as
menu items or command buttons.
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 rkey.
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.
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 A Warning contains information concerning personal safety. Failure
to follow directions in the warning could result in bodily harm or
death.
Menu Flow
Indicator
(>)
Words in bold font 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.

10400423-002 03/2013 ©2013 Overland Storage, Inc. 1
Contents
Preface
Chapter 1 - Logical Disk Administrator
Overview ............................................................................................................................................................... 1-1
Functions .......................................................................................................................................................... 1-1
Chapter 2 - Functions
Assigning and Canceling of Logical Disks ......................................................................................................... 2-1
Logical Disk Initialization ................................................................................................................................. 2-1
Reserving LD to Each Function ........................................................................................................................... 2-2
Work Disk for Optimization ............................................................................................................................. 2-2
Disk Arrays for which the Performance .................................................................................................. 2-2
Configuration Setting Operation Guard ............................................................................................................ 2-2
Setting Operation Guard Function ..................................................................................................................... 2-3
Guarded-Against Operations for Locked Resources ........................................................................... 2-3
Chapter 3 - Operation
How to Operate LD Administrator ...................................................................................................................... 3-1
LD Administrator Setting ................................................................................................................................. 3-1
Operations on [AccessControl] Tab ........................................................................................................... 3-22
Operations on [Setting/Reference] Tab .................................................................................................... 3-22
Description of LD Administrator Screen ........................................................................................................... 3-29
[LD Administrator] Operation Screen ......................................................................................................... 3-30
[LD Administrator] Tab ............................................................................................................................ 3-30
[Access Control] Tab .............................................................................................................................. 3-43
[Setting/Reference] Tab ......................................................................................................................... 3-43
Display of the Main Screen .......................................................................................................................... 3-46
iSCSI Lock Setting Operation ............................................................................................................................. 3-48
Operations on the LD Set Tab ..................................................................................................................... 3-48
Port Tab .......................................................................................................................................................... 3-51
Disk Array Tab .......................................................................................................................................... 3-52
Index

10400423-002 03/2013 ©2013 Overland Storage, Inc. 1-1
Chapter 1
Logical Disk Administrator
Overview
Functions
The SW (Software) LD (Logical Disk) Administrator (hereinafter Logical Disk or LD)
provides functions to:
•Control spare disks in respective servers as a group and add disks dynamically as
required and to lock configuration change.
•Set and cancel information on accessibility from the application server to logical disks
by using AccessControl
•Operate logical disks inaccessible from the application server
•Initialize logical disk
•Set and cancel the Work Disk for Optimization
•Lock and unlock configuration change
Using these functions enable users to easily and flexibly change configuration of logical
disks, to set accessibility, and to prevent wrong configuration changes caused by an
operational mistake.

10400423-002 03/2013 ©2013 Overland Storage, Inc. 1-2
SnapSAN S3000/S5000 Logical Disk Administrator’s Guide
Figure 1-1: LD Administrator Overview
[Inaccessible Area]
Logical disk groups hidden from the application server by the AccessControl function exist in
this area. This area can be classified into two groups as shown below:
[Preserve Group]...Logical disks in this area are hidden from the application server and
cannot be accessed. Contents of the logical disks are retained and existing logical disks
include ordinary logical disks with no specific purpose, replication volume (MV, RV), volume
for snapshots (BV), link-volume (LV), logical disks to which the data protection setting has
already been set by the WORM function, and control volume (CV).
[Reserve Group]...Logical disks in this area are hidden from the application server and
cannot be accessed. However, contents of the logical disks are not retained. Existing logical
disks include ordinary logical disks with no specific purpose and the Work Disks for
Optimization.
[Accessible Area]
Logical disk groups accessible from the application server by using the AccessControl
function. Contents of the logical disks depend on the application server, and existing logical
disks include ordinary logical disks with no specific purpose, replication volume (MV, RV),
volume for snapshots (BV), link-volume (LV), logical disks to which the data protection
setting has already been set by the WORM function, and control volume (CV). In addition,
each logical disk is assigned to an LD Set.

10400423-002 03/2013 ©2013 Overland Storage, Inc. 2-1
Chapter 2
Functions
Assigning and Canceling of Logical Disks
To use functions of the LD Administrator, it is indispensable to apply an AccessControl
program product.
In the LD Administrator, setting/canceling information on accessibility from the application
server to logical disks must be performed by using the AccessControl function. Logical disks
used from the application server are set to be assigned to the LD Set. Logical disks hidden
from the application server are set not to be assigned to the LD Set. Of logical disks hidden
from the application server, logical disks that require holding the contents are set to belong
to the preserve group. Logical disks that do not require holding the contents are set to belong
to the reserve group. (To delete the contents of a logical disk, initialize a logical disk.)
It is possible to display the total logical disk capacity by LD Set, by group, and by purpose.
This makes it easy to grasp the circumstances of capacity usage in disk arrays.
For an iSCSI LD Set, information on accessibility to a logical disk cannot be set or canceled
in the LD Administrator screen.
Set or cancel this information using the iSCSI setting wizard.
Logical Disk Initialization
When a logical disk used for the application server becomes unnecessary, it may be assigned
again to another application server. If an application server to which the logical disk is to be
assigned is in the same file system as the application server to which the disk has been
assigned, the logical disk contents can be used for the new application server without
change.
Even in such a case, it is possible to put access control by using a function of Access Control
first, then initialize the logical disks hidden from the application server, thus it helps to
ensure the security and secrecy.

10400423-002 03/2013 ©2013 Overland Storage, Inc. 2-2
SnapSAN S3000/S5000 Logical Disk Administrator’s Guide
Figure 2-1: Logical Disk Initialization
Reserving LD to Each Function
Work Disk for Optimization
The AutoTier function allows logical disks on a high-load physical disk to be assigned to a
low-load physical disk so as to distribute the load. In this case, it is necessary to specify
logical disks which are surely inaccessible, hidden from the application server as the
destination Work Disks for Optimization. The LD Administrator is capable of setting and
canceling the Work Disk for the AutoTier function.
Disk Arrays for which the Performance
Optimization Function Is Available
The AutoTier function becomes available for any of the following disk arrays for which the
AutoTier license is unlocked. The Work Disk for Optimization cannot be set to disk arrays
for which the AutoTier function is not available.
Configuration Setting Operation Guard
This is a function protecting the operating environment from wrong operations at
configuration change. Locking resources related to the operating services guards them
against configuration change operations such as access control setting and pair setting for
them. This function suppresses data destruction and service suspension due to human error
such as wrong operation, and improves the robustness.

10400423-002 03/2013 ©2013 Overland Storage, Inc. 2-3
SnapSAN S3000/S5000 Logical Disk Administrator’s Guide
Resources that can be locked are LD Sets, ports, logical disks, and disk arrays (disk array
name setting, network setting, and spare unbinding). Operation guard is available in the
configuration setting and change operations where user authority of L3 which is authorized
for execution from the SnapSAN Manager client is necessary.
Lock resources in advance to prevent a mistake at operation. When changing configuration,
unlock the resources to be changed before performing configuration change operation. This
can guard the resources not to be set and changed against wrong operation. Lock the
resources again after completing the configuration change operation.
Lock/unlock an LD Set, ports, and logical disks basically per LD Set. For logical disks and
ports not assigned to LD Sets, lock/unlock them per logical disk or port.
The guard operation by the configuration setting operation guard function is not performed
for an LD Set in the abnormal state. When the state of LD Set is restored, the guard
operation can be performed again.
Make sure that the operation target is not locked by the configuration setting operation
guard function when asking the maintenance person to change configuration. When the
operation target is locked, unlock it and ask the maintenance person to change
configuration.
When operating from the SnapSAN Manager client that does not support the configuration
setting operation guard function, operation is enabled even if the resources are locked. When
operating the locked resources, operate from the SnapSAN Manager client that supports this
function.
Setting Operation Guard Function
Disk arrays for which the configuration setting operation guard function is available are the
following for which the ReallocationControl license has been unlocked.
Guarded-Against Operations for Locked Resources
Locking resources guards the resources against the following operations. Refer to the
explanation of each operation.
Guarded-Against Operations for Locked LD Set
Guarded-Against Operations for Locked Port
Function Guarded-Against Operations
LD Administrator Adding logical disk, preserving logical disk, reserving logical disk
AccessControl
Deleting LD Set, renaming LD Set, linking with path information,
changing LD Set action mode, adding logical disk, deleting logical disk,
iSCSI authentication settings
Partitioning wizard
Allocating/freeing pool, allocating/freeing logical disk, allocating/freeing
port, changing/deleting cache segment
Function Guarded-Against Operations
AccessControl (FC)
Deleting LD Set, renaming LD Set, changing LD Set action mode, linking
with path information, changing mode type of port

10400423-002 03/2013 ©2013 Overland Storage, Inc. 2-4
SnapSAN S3000/S5000 Logical Disk Administrator’s Guide
Guarded-Against Operations for Locked Logical Disk
Guarded-Against Operations for Locked Disk Array
Configuration settings
Setting platform for port, setting port name, setting nicknames
collectively
Partitioning wizard
Allocating/freeing pool, allocating/freeing logical disk, allocating/freeing
port
Function Guarded-Against Operations
LD Administrator
Adding logical disk, preserving logical disk, reserving logical disk,
changing logical disk group, initializing logical disk, setting/canceling
optimization for logical disk
AccessControl
Deleting LD Set, renaming LD Set, changing LD Set action mode, adding
logical disk, deleting logical disk, setting iSCSI authentication
Configuration settings
Freeing logical disk, expanding logical disk capacity, changing the quota
or threshold value of a virtual capacity logical disk, adding generation,
binding link-volume, unbinding pool, expanding SRA, changing threshold
(snapshot), unbinding SRA, setting OS type/Logical Disk Name, setting
nicknames collectively, setting pair collectively
Cache partitioning
Changing/deleting cache segment, assigning/freeing logical disk,
starting cache partitioning function (taking over the setting), stopping
cache partitioning function
Replication Setting pair, unpairing, forcibly unpairing
WORM management
screen
Initializing OS type/Logical Disk Name
Partitioning wizard
Allocating/freeing pool, allocating/freeing logical disk,
changing/deleting cache segment
Function Guarded-Against Operations
Configuration settings Setting disk array name, setting network, unbinding spare disk
Function Guarded-Against Operations

10400423-002 03/2013 ©2013 Overland Storage, Inc. 3-1
Chapter 3
Operation
How to Operate LD Administrator
This software is installed at the same time the SnapSAN Manager server.of LD
Administrator is installed.
Perform LD Administrator operations on the following screen.
LD Administrator Setting
Figure 3-1: LD Administrator Setting

10400423-002 03/2013 ©2013 Overland Storage, Inc. 3-2
SnapSAN S3000/S5000 Logical Disk Administrator’s Guide
Figure 3-2: LD Administrator (Partitioning Function)
Figure 3-3: LD Administrator (iSCSI)

10400423-002 03/2013 ©2013 Overland Storage, Inc. 3-3
SnapSAN S3000/S5000 Logical Disk Administrator’s Guide
For an iSCSI LD Set, the following operations cannot be executed from the LD
Administrator screen.
Use the iSCSI Setup Wizard when specifying Access Control settings and to lock or unlock
an LD Set.
•Add
•Delete (To Preserve)
•Delete (To Reserve)
•Lock or unlock LD Sets
•Lock or unlock logical disks assigned to an LD Set
Add Button
When setting permission of access from the application server to a logical disk, select an LD
Set of a desirable application server from the tree view of the LD Set Definition and
Assignment display area. Then, select a logical disk to be added from the Inaccessible LD
List display area, and click the [Add] button.
However, a logical disk cannot be assigned to the LD Set locked by the configuration setting
operation guard function. Nor can the locked logical disks be assigned to the LD Set.
When the partitioning function is available, a logical disk of a partition different from that of
the LD Set cannot be assigned to the LD Set.
When the logical disk to be added is in the partition different from that of the LD Set, the
operation warning dialog screen shown below is displayed.
Figure 3-4: Confirm Dialog
Before adding a logical disk of the Reserve Group, it is necessary to perform Change Group
operation beforehand by using the Change Group button. Note that, with regard to a logical
disk which is being initialized or being performed by the AutoTier function, Change Group
operation is not possible until the processing is completed.
Moreover, logical disks not belonging to the group cannot be added.
When logical disks to be added do not belong to the Preserve Group located in the
Inaccessible LD List, the operation warning dialog screen shown below is displayed.
Figure 3-5: Warning Dialog
When conditions for addition are met, the "LD Setting" dialog screen below is displayed at
the time of clicking the [Add] button.

10400423-002 03/2013 ©2013 Overland Storage, Inc. 3-4
SnapSAN S3000/S5000 Logical Disk Administrator’s Guide
Figure 3-6: LD Setting
The logical disk to be newly added is displayed at the end of the logical disk group which has
been assigned on the "LD Setting" dialog screen, and LUN can be changed by button
operation. However, in the states (1) and (2) stated below, logical disks to be newly added
will be displayed after the selected LUN line:
(1) The LUN selected in the LD Set Definition and Assignment display area has not assigned
logical disks.
(2) The number of selected logical disks coincides with the number of lines of the LUN which
has not assigned logical disks or less.
Furthermore, when selecting multiple LUNs which have not assigned logical disks, the
selected LUNs must be sequential.
Only a newly added logical disk group can be moved on this dialog screen. Logical disks
cannot be moved to the LUN displayed as the icon. Furthermore, the LUN to which logical
disks have been assigned cannot be changed.
Logical disk information displayed on the "LD Setting" dialog screen is as follows:
LUN to which newly added, movable logical disks are assigned
LUN whose logical disks cannot be moved
Number
OS Type
Logical Disk Name
RAID
Capacity
PD Type
The following button can be operated on the "LD Setting" dialog screen.
[Top] Moves a selected logical disk in a newly added logical disk group to the top line of the
newly added logical disk group.
[Move Up] Moves a selected logical disk in a newly added logical disk group to the
immediately preceding line of the newly added logical disk group.

10400423-002 03/2013 ©2013 Overland Storage, Inc. 3-5
SnapSAN S3000/S5000 Logical Disk Administrator’s Guide
[Move Down] Moves a selected logical disk in a newly added logical disk group to the
immediately following line of the newly added logical disk group.
[Bottom] Moves a selected logical disk in a newly added logical disk group to the end line of
the newly added logical disk group.
[OK] Clicking this button will display a dialog for preliminarily confirming the addition.
Figure 3-7: Setting Check
[Cancel] Clicking this button will display the following dialog to make the operation
performed in this "LD Setting" dialog invalid and confirmation will be made about whether
to close the "LD Setting" dialog screen. Clicking [OK] button will close this "LD Setting"
dialog.
Figure 3-8: Close Setting
The logical disk display item order can be changed.
When performing [Add], logical disks which have been assigned to an "Add" target LD Set
cannot be doubly added to the LD Set.
•A logical disk can be assigned to multiple LD Sets.
•A link-volume cannot be assigned to LUN 0.
If the [Add] operation fails, the error dialog screen showing the failure will be displayed.

10400423-002 03/2013 ©2013 Overland Storage, Inc. 3-6
SnapSAN S3000/S5000 Logical Disk Administrator’s Guide
When an operation request is in error, there is a possibility of inconsistency between the disk
array setting information and the information administrated on the SnapSAN Manager
client. Therefore, click [Get Disk Array Info].
[Delete (To Preserve)] button
When setting inaccessibility from the application server to logical disks, stop the
assignment. In this case, select a logical disk or LD Set of a desirable application server from
the LD Set Definition and Assignment display area, and then click the [Delete (To Preserve)]
button.
However, the assignment of logical disks locked by the configuration setting operation guard
function cannot be canceled.
In addition, if it has been confirmed by the configuration change guard function that a target
application server is operating, it is not possible to cancel logical disk assignment. Stop all
target application servers, and then perform this operation.
•Logical disks which can be moved to the Preserve Group are as follows:
•Logical disks with no specific purpose
•Replication volumes set in pairs
•Volume with snapshot setting (BV)
•Link-volume (LV)
•Logical disks to which the data protection has already been set through the WORM
function
•Control volume (CV)
Clicking the [Delete (To Preserve)] button will display a dialog for confirmation.
Figure 3-9: Setting Check

10400423-002 03/2013 ©2013 Overland Storage, Inc. 3-7
SnapSAN S3000/S5000 Logical Disk Administrator’s Guide
In the case where the logical disks selected are assigned to multiple LD Sets, the following
dialog screen will be displayed and the execution of the [Delete (To Preserve)] operation
concerning the multiple LD Sets will be reconfirmed.
Figure 3-10: Move Sets
The [Delete (To Preserve)] operation targets logical disks assigned to all LD Sets. Therefore,
when moving logical disks from a particular LD Set to the Preserve Group, it is necessary to
perform operation by using AccessControl located in the second tab.
The [Delete (To Preserve)] operation immediately reflects on the disk array. If this operation
is wrong, the application server suddenly stops recognizing the logical disk in use. It is
necessary to perform this operation after checking the operation state. Furthermore, stop
business or the application server according to the necessity.
If all the logical disks and ports that have been assigned to the LD Set are locked by clicking
[Delete (To Preserve)], a dialog box appears that confirms whether to lock the LD set. From
this dialog box, you can select whether to lock the LD set.
If the [Delete (To Preserve)] operation fails, the error dialog screen showing the failure will
be displayed.
When an operation request is in error, there is a possibility of inconsistency between the disk
array setting information and the information administrated on the SnapSAN Manager
client. Therefore, click [Get Disk Array Info].
(3)[Delete (To Reserve)] button
When setting inaccessibility from the application server to a logical disk, stop the
assignment. In this case, select a logical disk or LD Set of a desirable application server,
which are to be reserved for Initialization or the use of Work Disks for Optimization, from
the LD Set Definition and Assignment display area, and then click the [Delete (To Reserve)]
button.
However, the assignment of logical disks locked by the configuration setting operation guard
function cannot be canceled.
In addition, if it has been confirmed by the configuration change guard function that a target
application server is operating, it is not possible to cancel logical disk assignment. Stop all
target application servers, and then perform this operation.
•Logical disks which can be moved to the Reserve Group are as follows:
•Logical disks with no specific purpose
•Logical disks which are not being performed by the AutoTier function
•Logical disks which are not being initialized by the WORM function
•Logical disks of which the update prevention state is not "prevent"
•Logical disks which are not in the rotation stop state
Clicking the [Delete (To Reserve)] button will display a dialog for confirmation.

10400423-002 03/2013 ©2013 Overland Storage, Inc. 3-8
SnapSAN S3000/S5000 Logical Disk Administrator’s Guide
Figure 3-11: Delete Moving
When the logical disk corresponds to any of the following, the corresponding operation
warning dialog below is displayed.
•Pair settings for replication are being carried out
•Snapshot settings are effective
•Link-volume
•Data protection has already been set through the WORM function
•Re-initialization due to unsetting of the volume protection is being executed
•The update prevention state is "prevent"
•In the rotation stop state
•Control volume
Figure 3-12: Moving Conditions (1)

10400423-002 03/2013 ©2013 Overland Storage, Inc. 3-9
SnapSAN S3000/S5000 Logical Disk Administrator’s Guide
Figure 3-13: Moving Conditions (3)
Figure 3-14: Moving Conditions (4)
Figure 3-15: Update Prevention
Figure 3-16: Stop State
In the case where the logical disks selected are assigned to multiple LD Sets, the following
dialog screen will be displayed and the execution of the [Delete (To Reserve)] operation
concerning the multiple LD Sets will be reconfirmed.