Compex SCSI TO S-ATA RAID Installation and operating manual

RAID SCSI TO S-ATA
Installation Reference Guide
Revision 1.2

Copyright
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Changes
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without notice.

FCC Compliance Statement
This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC rules. These limits are
designed to provide reasonable protection against harmful interference in
residential installations. This equipment generates, uses, and can radiate ra-
dio frequency energy, and if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications.
However, there is not guarantee that interference will not occur in a particular
installation. If this equipment does cause interference to radio or television
equipment reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
1. Reorient or relocate the receiving antenna
2. Move the equipment away from the receiver
3. Plug the equipment into an outlet on a circuit different from that to
which the receiver is powered.
4. Consult the dealer or an experienced radio/television technician for
help
All external connections should be made using shielded cables.

About This Manual
Welcome to your Redundant Array of Independent Disks System User’s Guide.
This manual covers everything you need to know in learning how to install or
configure your RAID system. This manual also assumes that you know the basic
concepts of RAID technology. It includes the following information :
Chapter 1 Introduction
Introduces you to Disk Array’s features and general technology concepts.
Chapter 2 Getting Started
Helps user to identify parts of the Disk Array and prepare the hardware for configuration.
Chapter 3 Configuring
Quick Setup
Provides a simple way to setup your Disk Array.
Customizing Setup
Provides step-by-step instructions to help you to do setup or re-configure your Disk Array.
Chapter 4 Array Maintenance
Adding Cache Memory
Provides a detailed procedure to increase cache memory from the default amount of 128MB to
higher.
Updating Firmware
Provides step-by-step instructions to help you to update the firmware to the latest version.
Hot Swap Components
Describes all hot swap modules on Disk Array and provides the detailed procedure to replace
them.

Table of Contents
Chapter 1 Introduction
1.1 Key Features..........................................................................................................
1.2 RAID Concepts......................................................................................................
1.3 SCSI Concepts......................................................................................................
1.3.1 Multiple SCSI Format Support..................................................................
1.3.2 Host SCSI ID Selection..............................................................................
1.3.3 Terminators..................................................................................................
1.4 ArrayDefinition.......................................................................................................
1.4.1 RAID set........................................................................................................
1.4.2 Volume Set...................................................................................................
1.4.3 Easy of Use features..................................................................................
1.4.4 HighAvailability............................................................................................
Chapter 2 Getting Started
2.1 Unpackingthe subsystem.........................................................................................
2.2 Identifying Parts of the subsystem.....................................................................
2.2.1 FrontView......................................................................................................
2.2.2 Rear View.....................................................................................................
2.3 Connecting to Host...............................................................................................
2.4 SCSI Termination..................................................................................................
2.5 Powering-on the subsystem..............................................................................
2.6 Install Hard Drives................................................................................................
2.7 Connecting UPS...................................................................................................
2.8 Connecting to PC or Terminal............................................................................
Chapter 3 Configuring
3.1 Configuring through aTerminal..............................................................................
3.2 Configuring the Subsystem Using the LCD Panel.........................................
3.3 MenuDiagram.......................................................................................................
3.4 Web browser-based Remote RAID management via R-Link ethernet.......
3.5 Quick Create..........................................................................................................
3.6 Raid Set Functions...............................................................................................
3.6.1 Create Raid Set..........................................................................................
3.6.2 Delete Raid Set............................................................................................
3.6.3 Expand Raid Set...........................................................................................
3.6.4 Activate Incomplete Raid Set...................................................................
3.6.5 Create Hot Spare........................................................................................
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3.6.6 Delete Hot Spare.........................................................................................
3.6.7 Rescue Raid Set..........................................................................................
3.7 Volume SetFunction.................................................................................................
3.7.1 Create Volume Set......................................................................................
3.7.2 Delete Volume Set......................................................................................
3.7.3 Modify Volume Set........................................................................................
3.7.3.1 Volume Expansion.......................................................................
3.7.4 Volume Set Migration..................................................................................
3.7.5 CheckVolume Set........................................................................................
3.7.6 Stop Volume Set Check..............................................................................
3.8 PhysicalDrive..........................................................................................................
3.8.1 Create Pass-Through Disk........................................................................
3.8.2 Modify Pass-Through Disk.........................................................................
3.8.3 Delete Pass-Through Disk........................................................................
3.8.4 Identify SelectedDrive.................................................................................
3.9 System Configuration...........................................................................................
3.9.1 System Configuration.................................................................................
3.9.2 U320 SCSI Target Configuration...............................................................
3.9.3 EthernetConfig................................................................................................
3.9.4 Alert By Mail Config......................................................................................
3.9.5 SNMPConfiguration.........................................................................................
3.9.6 ViewEvents.....................................................................................................
3.9.7 Generate Test Events.................................................................................
3.9.8 Clear Events Buffer......................................................................................
3.9.9 Modify Password..........................................................................................
3.9.10UpgradeFirmware.........................................................................................
3.10 Information Menu....................................................................................................
3.10.1 RaidSet Hierarchy.....................................................................................
3.10.2 System Information..................................................................................
3.10.3 Hardware Monitor......................................................................................
3.11 Creating a new RAID or Reconfiguring an Existing RAID..............................
Chapter 4 Array Maintenance
4.1 Memory Upgrades................................................................................................
4.1.1 Installing Memory Module.........................................................................
4.2 Upgrading the Firmware.....................................................................................
4.3 Hot Swap components........................................................................................
4.3.1 Replacing a disk.........................................................................................
4.3.2 Replacing a Power Supply........................................................................
4.3.3 Replacing a Fan..........................................................................................
Appendix A Technical Specification...................................................
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A-1

Introduction 1-1
Chapter 1
Introduction
The RAID subsystem is a Ultra 320 LVD SCSI-to-Serial ATA II RAID (Redundant
Arrays of Independent Disks) disk array subsystem. It consists of a RAID disk
array controller and twelve (12) disk trays.
The subsystem is a “Host Independent” RAID subsystem supporting RAID
levels 0, 1, 3, 5, 6 0+1 and JBOD. Regardless of the RAID level the sub-
system is configured for, each RAID array consists of a set of disks which to
the user appears to be a single large disk capacity.
One unique feature of these RAID levels is that data is spread across sepa-
rate disks as a result of the redundant manner in which data is stored in a
RAID array. If a disk in the RAID array fails, the subsystem continues to func-
tion without any risk of data loss. This is because redundant information is
stored separately from the data. This redundant information will then be used
to reconstruct any data that was stored on a failed disk. In other words, the
subsystem can tolerate the failure of a drive without losing data while operat-
ing independently of each other.
The subsystem is also equipped with an environment controller which is ca-
pable of accurately monitoring the internal environment of the subsystem
such as its power supplies, fans, temperatures and voltages. The disk trays
allow you to install any type of 3.5-inch hard drive. Its modular design allows
hot-swapping of hard drives without interrupting the subsystem’s operation.

Introduction
1-2
1.1 Key Features
Subsystem Features:
Features an Intel 80321 64 bit RISC I/O processor
Build-in 128MB cache memory, expandable up to 1024MB
Ultra 320 LVD host port
Smart-function LCD panel
Supports up to twelve (12) 1" hot-swappable Serial ATA II hard drives
Redundant load sharing hot-swappable power supplies
High quality advanced cooling fans
Local audible event notification alarm
Supports password protection and UPS connection
Built-in R-Link LAN port interface for remote management & event notifica-
tion
Dual host channels support clustering technology
The RAID subsystem is made by aluminum. Aluminum is an excellent ther-
mal conductor and Aluminum offers a unique combination of light weight
and high strength.
Real time drive activity and status indicators
RAID Function Features:
Supports RAID levels 0, 1, 0+1, 3, 5, 6 and JBOD
Supports hot spare and automatic hot rebuild
Allows online capacity expansion within the enclosure
Tagged command queuing for 256 commands, allows for overlapping
data streams
Transparent data protection for all popular operating systems
Bad block auto-remapping
Supports multiple array enclosures per host connection
Multiple RAID selection
Array roaming
Online RAID level migration

Introduction 1-3
1.2 RAID Concepts
RAID Fundamentals
The basic idea of RAID (Redundant Array of Independent Disks) is to combine
multiple inexpensive disk drives into an array of disk drives to obtain performance,
capacity and reliability that exceeds that of a single large drive. The array of
drives appears to the host computer as a single logical drive.
Six types of array architectures, RAID 1 through RAID 6, were originally defined,
each provides disk fault-tolerance with different compromises in features and
performance. In addition to these five redundant array architectures, it has become
popular to refer to a non-redundant array of disk drives as a RAID 0 array.
Disk Striping
Fundamental to RAID technology is striping. This is a method of combining
multiple drives into one logical storage unit. Striping partitions the storage
space of each drive into stripes, which can be as small as one sector (512
bytes) or as large as several megabytes. These stripes are then interleaved
in a rotating sequence, so that the combined space is composed alternately
of stripes from each drive. The specific type of operating environment deter-
mines whether large or small stripes should be used.
Most operating systems today support concurrent disk I/O operations across
multiple drives. However, in order to maximize throughput for the disk subsystem,
the I/O load must be balanced across all the drives so that each drive can be
kept busy as much as possible. In a multiple drive system without striping, the
disk I/O load is never perfectly balanced. Some drives will contain data files that
are frequently accessed and some drives will rarely be accessed.

Introduction
1-4
By striping the drives in the array with stripes large enough so that each record
falls entirely within one stripe, most records can be evenly distributed across all
drives. This keeps all drives in the array busy during heavy load situations. This
situation allows all drives to work concurrently on different I/O operations, and
thus maximize the number of simultaneous I/O operations that can be performed
by the array.
Definition of RAID Levels
RAID 0 is typically defined as a group of striped disk drives without parity or data
redundancy. RAID 0 arrays can be configured with large stripes for multi-user
environments or small stripes for single-user systems that access long sequential
records. RAID 0 arrays deliver the best data storage efficiency and performance
of any array type. The disadvantage is that if one drive in a RAID 0 array fails, the
entire array fails.