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Fibre to SAS/SATA II

RAID Subsystem

User Manual

Revision 1.2

Fibre to SAS/SATA II RAID Subsystem

User Manual

Table of Contents

Preface................................................................................................................................5

Before You Begin .............................................................................................................6

Safety Guidelines...............................................................................................................................................................6

Controller Configurations.............................................................................................................................................. 6

Packaging, Shipment and Delivery............................................................................................................................ 6

Unpacking the Shipping Carton............................................................................................................................7

Chapter 1 Product Introduction.................................................................................8

1.1 Technical Specifications....................................................................................................................................... 9

1.2 RAID Concepts ......................................................................................................................................................11

1.3 Fibre Functions......................................................................................................................................................16

1.3.1 Overview .........................................................................................................................................................16

1.3.2 Three ways to connect (FC Topologies)...............................................................................................16

1.3.3 Basic Elements..............................................................................................................................................17

1.3.4 LUN Masking.................................................................................................................................................18

1.4 Array Definition.....................................................................................................................................................18

1.4.1 Raid Set...........................................................................................................................................................18

1.4.2 Volume Set ....................................................................................................................................................19

1.5 High Availability....................................................................................................................................................19

1.5.1 Creating Hot Spares .............................................................................................................................19

1.5.2 Hot-Swap Disk Drive Support ..........................................................................................................20

1.5.3 Hot-Swap Disk Rebuild........................................................................................................................20

Chapter 2 Identifying Parts of the RAID Subsystem.......................................... 21

2.1 Main Components...............................................................................................................................................21

2.1.1 Front View......................................................................................................................................................21

2.1.1.1 Disk Tray.................................................................................................................................................21

2.1.1.2 LCD Front Panel..................................................................................................................................23

2.1.1.3 LCD IP Address in Dual Controller Mode................................................................................25

2.1.2 Rear View........................................................................................................................................................26

2.2 Controller Module................................................................................................................................................27

2.2.1 Controller Module Panel..........................................................................................................................27

2.3 Power Supply / Fan Module (PSFM)............................................................................................................29

2.3.1 PSFM Panel....................................................................................................................................................29

Chapter 3 Getting Started with the Subsystem................................................... 31

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3.1 Powering On ..........................................................................................................................................................31

3.2 Disk Drive Installation.........................................................................................................................................32

3.2.1 Installing a SAS Disk Drive in a Disk Tray.........................................................................................32

3.2.2 Installing a SATA Disk Drive (Dual Controller Mode) in a Disk Tray.....................................34

Chapter 4 RAID Configuration Utility Options .................................................... 36

4.1 Configuration through Terminal....................................................................................................................36

4.2 Configuration through the LCD Panel.........................................................................................................42

4.2.1 Menu Diagram .............................................................................................................................................43

4.3 Configuration through web browser-based proRAID Manager.......................................................49

Chapter 5 RAID Management.................................................................................. 51

5.1 Quick Function......................................................................................................................................................51

5.1.1 Quick Create..................................................................................................................................................51

5.2 RAID Set Functions..............................................................................................................................................53

5.2.1 Create RAID Set...........................................................................................................................................53

5.2.2 Delete RAID Set...........................................................................................................................................54

5.2.3 Expand RAID Set..........................................................................................................................................55

5.2.4 Offline RAID Set...........................................................................................................................................58

5.2.5 Activate Incomplete RAID Set................................................................................................................59

5.2.6 Create Hot Spare.........................................................................................................................................61

5.2.7 Delete Hot Spare.........................................................................................................................................62

5.2.8 Rescue Raid Set ...........................................................................................................................................63

5.3 Volume Set Function..........................................................................................................................................64

5.3.1 Create Volume Set......................................................................................................................................64

5.3.2 Create Raid 30/50/60 ................................................................................................................................67

5.3.3 Delete Volume Set......................................................................................................................................68

5.3.4 Modify Volume Set.....................................................................................................................................69

5.3.4.1 Volume Set Expansion......................................................................................................................70

5.3.4.2 Volume Set Migration......................................................................................................................71

5.3.5 Check Volume Set.......................................................................................................................................72

5.3.6 Schedule Volume Check...........................................................................................................................74

5.3.7 Stop Volume Check....................................................................................................................................75

5.4 Physical Drive.........................................................................................................................................................76

5.4.1 Create Pass-Through Disk .......................................................................................................................76

5.4.2 Modify a Pass-Through Disk..................................................................................................................77

5.4.3 Delete Pass-Through Disk .......................................................................................................................78

5.4.4 Identify Enclosure........................................................................................................................................79

5.4.5 Identify Selected Drive..............................................................................................................................80

5.5 System Controls....................................................................................................................................................81

5.5.1 System Configuration................................................................................................................................81

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5.5.2 HDD Power Management........................................................................................................................83

5.5.3 Fibre Channel Config.................................................................................................................................85

5.5.4 EtherNet Configuration.............................................................................................................................87

5.5.5 Alert By Mail Configuration....................................................................................................................88

5.5.6 SNMP Configuration..................................................................................................................................89

5.5.7 NTP Configuration......................................................................................................................................90

5.5.8 View Events / Mute Beeper ....................................................................................................................91

5.5.9 Generate Test Event...................................................................................................................................92

5.5.10 Clear Event Buffer.....................................................................................................................................93

5.5.11 Modify Password.......................................................................................................................................94

5.5.12 Upgrade Firmware....................................................................................................................................94

5.5.13 Shutdown Controller...............................................................................................................................95

5.5.14 Restart Controller......................................................................................................................................96

5.6 Information Menu................................................................................................................................................97

5.6.1 RAID Set Hierarchy.....................................................................................................................................97

5.6.2 System Information....................................................................................................................................99

5.6.3 Hardware Monitor....................................................................................................................................101

Chapter 6 Maintenance........................................................................................... 102

6.1 Upgrading the RAID Controller’s Cache Memory ............................................................................... 102

6.1.1 Replacing the Memory Module.........................................................................................................102

6.2 Upgrading the RAID Controller’s Firmware ........................................................................................... 103

6.3 Replacing Subsystem Components........................................................................................................... 110

6.3.1 Replacing Controller Module..............................................................................................................110

6.3.1.1 Replacing Controller Module with Plate Cover .................................................................. 111

6.3.2 Replacing Power Supply Fan Module..............................................................................................112

6.3.2.1 Replacing Power Supply Fan Module with Plate Cover.................................................. 113

Appendix 1 Volume Mapping in Dual Controller Mode ................................. 114

Appendix 2 Redundant Controllers Switch Function ....................................... 120

1. The Location of the Switch in the Controller................................................................................. 120

2. Using Command in Web GUI to Simulate Controller Failure............................................... 120

3. How to Remove a Controller to Simulate Controller Failure ............................................... 122

Appendix 3 Disk Power Off/On Function in Web GUI..................................... 126

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Preface

About this manual

This manual provides information regarding the hardware features, installation and configuration of the RAID subsystem. This document also describes how to use the storage management software. Information contained in the manual has been reviewed for accuracy, but not for product warranty because of the various environment/OS/settings. Information and specifications will be changed without further notice.

This manual uses section numbering for every topic being discussed for easy and convenient way of finding information in accordance with the user’s needs. The following icons are being used for some details and information to be considered in going through with this manual:

No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written consent.

Trademarks

All products and trade names used in this document are trademarks or registered trademarks of their respective owners.

Changes

The material in this document is for information only and is subject to change without notice.

IMPORTANT!

These are the important information that the user must remember.

WARNING!

These are the warnings that the user must follow to avoid unnecessary errors and bodily injury during hardware and software operation of the subsystem.

CAUTION:

These are the cautions that user must be aware of to prevent damage to the subsystem and/or its components.

NOTES:

These are notes that contain useful information and tips that the user must give attention to in going through with the subsystem operation.

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Before You Begin

Before going through with this manual, you should read and focus on the following safety guidelines. Notes about the subsystem’s controller configuration and the product packaging and delivery are also included here.

Safety Guidelines

To provide reasonable protection against any harm on the part of the user and to obtain maximum performance, user is advised to be aware of the following safety guidelines particularly in handling hardware components:

Upon receiving of the product:

 Place the product in its proper location.  Do not try to lift it by yourself alone. Two or more persons are needed to remove

or lift the product to its packaging. To avoid unnecessary dropping out, make sure that somebody is around for immediate assistance.

 It should be handled with care to avoid dropping that may cause damage to the

product. Always use the correct lifting procedures.

Upon installing of the product:

 Ambient temperature is very important for the installation site. It must not

exceed 30

◦

C. Due to seasonal climate changes; regulate the installation site

temperature making it not to exceed the allowed ambient temperature.

 Before plugging-in any power cords, cables and connectors, make sure that the

power switches are turned off. Disconnect first any power connection if the power supply module is being removed from the enclosure.

 Outlets must be accessible to the equipment.  All external connections should be made using shielded cables and as much as

possible should not be performed by bare hand. Using anti-static hand gloves is recommended.

 In installing each component, secure all the mounting screws and locks. Make

sure that all screws are fully tightened. Follow correctly all the listed procedures in this manual for reliable performance.

Controller Configurations

This RAID subsystem supports both single controller and dual controller configurations. The single controller can be configured depending on the user’s requirements. On the other side, these controllers can be both configured and be active to increase system efficiency and to improve performance.

This manual will discusses both single and dual controller configuration.

Packaging, Shipment and Delivery

 Before removing the subsystem from the shipping carton, you should visually

inspect the physical condition of the shipping carton.

 Unpack and verify that the contents of the shipping carton are complete and in

good condition.

 Exterior damage to the shipping carton may indicate that the contents of the

carton are damaged.

 If any damage is found, do not remove the components; contact the dealer where

you purchased the subsystem for further instructions.

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Unpacking the Shipping Carton

The shipping package contains the following:

NOTE: If any damage is found, contact the dealer or vendor for assistance.

RAID Subsystem Unit

Two (2) power cords

Two Fibre optic cables (single controller)

Note: Four Fibre optic cables for dual RAID controllers

One (1) RJ45 Ethernet cable

Note: Two Ethernet cables for dual RAID controllers

One (1) external serial cable RJ11-to-DB9

Note: Two serial cables for dual RAID controllers

One(1) Controller Module Plate Cover

Note: For dual RAID controller

One(1) PSFM Plate Cover

User Manual

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Chapter 1 Product Introduction

The Fibre to SAS/SATA II RAID Subsystem

Features:

 Fully redundant with hot swappable Controller, disks, cooling fans and power

supplies

 Modular Design with Common Parts  Supports RAID levels 0, 1, 0+1, 3, 5, 6, 30, 50, 60 and JBOD  Supports online Array roaming  Online RAID level/stripe size migration  Online capacity expansion and RAID level migration simultaneously  Online Volume Set Expansion  Supports multiple array enclosures per host connection  Supports greater than 2TB per volume set (64-bit LBA support)  Supports 4K bytes/sector for Windows up to 16TB per volume set  Support spin down drives when not in use to extend service (MAID 2.0)  Supports up to 128 LUNs per RAID set  Transparent data protection for all popular operating systems  RAID ADG provides the highest level of data protection  Instant availability and background initialization  Supports S.M.A.R.T, NCQ and OOB Staggered Spin-up capable drives  Supports hot spare and automatic hot rebuild  Local audible event notification alarm  Supports password protection  Built-in serial port interface for remote event notification  Redundant flash image for high availability

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1.1 Technical Specifications

Model EP-2243S-F4S3 EP-2243D-F4S3

Form - factor 2U 19-inch rackmount

chassis

2U 19-inch rackmount chassis

RAID processor Intel IOP341 64-bit Intel IOP341 64-bit RAID level 0, 1, 0+1, 3, 5, 6, 30, 50,

60 and JBOD

0, 1, 0+1, 3, 5, 6, 30, 50, 60 and JBOD

Cache memory 512MB ~ 4GB DDR-II

SDRAM

1GB ~ 8GB DDR-II SDRAM

Host bus interface Two FC-AL 4Gb Fibre Four FC-AL 4Gb Fibre Drive bus interface SAS or SATA II SAS or SATA II Data transfer rate Up to 400MB/sec per

channel

Up to 400MB/sec per channel

Expansion One 4x mini SAS Two 4x mini SAS Controller Redundancy Option Yes Hot-swap drive trays Twenty four (24) 2.5” trays Twenty four (24) 2.5”

trays

Online capacity expansion, RAID level/stripe size migration

Yes Yes

Online Volume sets expansion

Yes Yes

Online Array roaming Yes Yes Online consistency check Yes Yes SMTP manager and SNMP agent

Yes Yes

E-mail Notification Yes Yes Redundant Flash image Yes Yes R-Link support Yes (RJ-45) Yes (RJ-45) Support over 2TB per volume

Yes Yes

Instant availability and background initialization

Yes Yes

S.M.A.R.T. support Yes Yes New disk insertion /

removal detection

Yes Yes

Failed drive auto rebuild Yes Yes Continuous rebuild Yes Yes

Multiple RAID selection Yes Yes Bad block auto-

remapping

Yes Yes

Audio alarm Yes Yes Password protection Yes Yes Monitor port Yes Yes

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SES2 enclosure management

Yes Yes

Hot-swap power supplies Two(2) 400W power

supplies w/PFC

Two(2) 400W power supplies w/PFC

Cooling fans 2 2 Battery backup Option Option Power requirements

C 90V ~ 264V full range

8A ~ 4A, 47Hz ~ 63Hz

AC 90V ~ 264V full range 8A ~ 4A, 47Hz ~ 63Hz

Relative Humidity: Operating Temp:

10% ~ 85% Noncondensing 10

C ~ 40oC (50oF ~

104

10% ~ 85% Noncondensing 10

C ~ 40oC (50oF ~

104

Physical Dimensions: 88(H)x483(W)x559(D)mm 88(H)x483(W)x559(D)mm Weight 14kg (without drives) 15kg (without drives)

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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.

Five types of array architectures, RAID 1 through RAID 5, 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 arrays.

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 determines 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.

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.

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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.

RAID 1, also known as disk mirroring, is simply a pair of disk drives that store duplicate data but appear to the computer as a single drive. Although striping is not used within a single mirrored drive pair, multiple RAID 1 arrays can be striped together to create a single large array consisting of pairs of mirrored drives. All writes must go to both drives of a mirrored pair so that the information on the drives is kept identical. However, each individual drive can perform simultaneous, independent read operations. Mirroring thus doubles the read performance of a single non-mirrored drive and while the write performance is unchanged. RAID 1 delivers the best performance of any redundant array type. In addition, there is less performance degradation during drive failure than in RAID 5 arrays.

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RAID 3 sector-stripes data across groups of drives, but one drive in the group is

dedicated for storing parity information. RAID 3 relies on the embedded ECC in each sector for error detection. In the case of drive failure, data recovery is accomplished by calculating the exclusive OR (XOR) of the information recorded on the remaining drives. Records typically span all drives, which optimizes the disk transfer rate. Because each I/O request accesses every drive in the array, RAID 3 arrays can satisfy only one I/O request at a time. RAID 3 delivers the best performance for single-user, single-tasking environments with long records. Synchronized-spindle drives are required for RAID 3 arrays in order to avoid performance degradation with short records. RAID 5 arrays with small stripes can yield similar performance to RAID 3 arrays.

Under RAID 5 parity information is distributed across all the drives. Since there is no dedicated parity drive, all drives contain data and read operations can be overlapped on every drive in the array. Write operations will typically access one data drive and one parity drive. However, because different records store their parity on different drives, write operations can usually be overlapped.

Dual-level RAID achieves a balance between the increased data availability inherent in RAID 1, RAID 3, RAID 5, or RAID 6 and the increased read performance inherent in disk striping (RAID 0). These arrays are sometimes referred to as RAID 0+1 (1E), RAID 30, RAID 50 or RAID 60.

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RAID 6 is similar to RAID 5 in that data protection is achieved by writing parity information to the physical drives in the array. With RAID 6, however, two sets of parity data are used. These two sets are different, and each set occupies a capacity equivalent to that of one of the constituent drives. The main advantage of RAID 6 is High data availability – any two drives can fail without loss of critical data.

In summary:

 RAID 0 is the fastest and most efficient array type but offers no fault-tolerance. RAID

0 requires a minimum of one drive.

 RAID 1 is the best choice for performance-critical, fault-tolerant environments. RAID

1 is the only choice for fault-tolerance if no more than two drives are used.

 RAID 3 can be used to speed up data transfer and provide fault-tolerance in single-

user environments that access long sequential records. However, RAID 3 does not allow overlapping of multiple I/O operations and requires synchronized-spindle drives to avoid performance degradation with short records. RAID 5 with a small stripe size offers similar performance.

 RAID 5 combines efficient, fault-tolerant data storage with good performance

characteristics. However, write performance and performance during drive failure is slower than with RAID 1. Rebuild operations also require more time than with RAID 1 because parity information is also reconstructed. At least three drives are required for RAID 5 arrays.

 RAID 6 is essentially an extension of RAID level 5 which allows for additional fault

tolerance by using a second independent distributed parity scheme (two-dimensional parity). Data is striped on a block level across a set of drives, just like in RAID 5, and a second set of parity is calculated and written across all the drives; RAID 6 provides for an extremely high data fault tolerance and can sustain multiple simultaneous drive failures. It is a perfect solution for mission critical applications.

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RAID Management

The subsystem can implement several different levels of RAID technology. RAID levels supported by the subsystem are shown below.

RAID Level Description

Min. Drives

Block striping is provide, which yields higher performance than with individual drives. There is no redundancy.

Drives are paired and mirrored. All data is 100% duplicated on an equivalent drive. Fully redundant.

Data is striped across several physical drives. Parity protection is used for data redundancy.

Data is striped across several physical drives. Parity protection is used for data redundancy. Requires N+2 drives to implement because of two-dimensional parity scheme.

0+1 (1E)

Combination of RAID levels 0 and 1. This level provides striping and redundancy through mirroring. RAID 0+1 requires the use of an even number of disk drives to achieve data protection, while RAID 1E (Enhanced Mirroring) uses an odd number of drives.

4 (3)

Combination of RAID levels 0 and 3. This level is best implemented on two RAID 3 disk arrays with data striped across both disk arrays.

RAID 50 provides the features of both RAID 0 and RAID 5. RAID 50 includes both parity and disk striping across multiple drives. RAID 50 is best implemented on two RAID 5 disk arrays with data striped across both disk arrays.

RAID 60 combines both RAID 6 and RAID 0 features. Data is striped across disks as in RAID 0, and it uses double distributed parity as in RAID 6. RAID 60 provides data reliability, good overall performance and supports larger volume sizes.

RAID 60 also provides very high reliability because data is still available even if multiple disk drives fail (two in each disk array).

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1.3 Fibre Functions

1.3.1 Overview

Fibre Channel is a set of standards under the auspices of ANSI (American National Standards Institute). Fibre Channel combines the best features from SCSI bus and IP protocols into a single standard interface, including high-performance data transfer (up to 400 MB per second), low error rates, multiple connection topologies, scalability, and more. It retains the SCSI command-set functionality, but uses a Fibre Channel controller instead of a SCSI controller to provide the interface for data transmission. In today’s fast-moving computer environments, Fibre Channel is the serial data transfer protocol choice for high-speed transportation of large volume of information between workstation, server, mass storage subsystems, and peripherals. Physically, the Fibre Channel can be an interconnection of multiple communication points, called N_Ports. The port itself only manages the connection between itself and another such end-port which, which could either be part of a switched network, referred to as a Fabric in FC terminology, or a point-topoint link. The fundamental elements of a Fibre Channel Network are Port and Node. So a Node can be a computer system, storage device, or Hub/Switch.

This chapter describes the Fibre-specific functions available in the Fibre Channel RAID controller. Optional functions have been implemented for Fibre Channel operation whic h is only available in the Web browser-based RAID manager. The LCD and VT-100 can’t be used to configure some of the options available for Fibre Channel RAID controller.

1.3.2 Three ways to connect (FC Topologies)

A topology defines the interconnection scheme. It defines the number of devices that can be connected. Fibre Channel supports three different logical or physical arrangements (topologies) for connecting the devices into a network:

 Point-to-Point  Arbitrated Loop(AL) 

Switched (Fabric)

The physical connection between devices varies from one topology to another. In all of these topologies, a transmitter node in one device sends information to a receiver node in another device. Fibre Channel networks can use any combination of point-to-point, arbitrated loop (FC_AL), and switched fabric topologies to provide a variety of device sharing options.

Point-to-point

A point-to-point topology consists of two and only two devices connected by N- ports of which are connected directly. In this topology, the transmit Fibre of one device connects to the receiver Fibre of the other device and vice versa. The connection is not shared with any other devices. Simplicity and use of the full data transfer rate make this Point-to-point topology an ideal extension to the standard SCSI bus interface. The point-to-point topology extends SCSI connectivity from a server to a peripheral device over longer distances.

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Arbitrated Loop

The arbitrated loop (FC-AL) topology provides a relatively simple method of connecting and sharing resources. This topology allows up to 126 devices or nodes in a single, continuous loop or ring. The loop is constructed by daisy-chaining the transmit and receive cables from one device to the next or by using a hub or switch to create a virtual loop. The loop can be self-contained or incorporated as an element in a larger network. Increasing the number of devices on the loop can reduce the overall performance of the loop because the amount of time each device can use the loop is reduced. The ports in an arbitrated loop are referred as L-Ports.

Switched Fabric

A switched fabric a term is used in a Fibre channel to describe the generic switching or routing structure that delivers a frame to a destination based on the destination address in the frame header. It can be used to connect up to 16 million nodes, each of which is identified by a unique, world-wide name (WWN). In a switched fabric, each data frame is transferred over a virtual point-to-point connection. There can be any number of full-bandwidth transfers occurring through the switch. Devices do not have to arbitrate for control of the network; each device can use the full available bandwidth.

A fabric topology contains one or more switches connecting the ports in the FC network. The benefit of this topology is that many devices (approximately 2-24) can be connected. A port on a Fabric switch is called an F-Port (Fabric Port). Fabric switches can function as an alias server, multi-cast server, broadcast server, quality of service facilitator and directory server as well.

1.3.3 Basic Elements

The following elements are the connectivity of storages and Server components using the Fibre channel technology.

Cables and connectors

There are different types of cables of varies lengths for use in a Fibre Channel configuration. Two types of cables are supported: Copper and Optical (fiber). Copper cables are used for short distances and transfer data up to 30 meters per link. Fiber cables come in two distinct types: Multi-Mode fiber (MMF) for short distances (up to 2km), and Single-Mode Fiber (SMF) for longer distances (up to 10 kilometers). By de f a ult, t h e RAID s u b syste m supports two short-wave multi-mode fibre optic SFP connectors.

Fibre Channel Adapter

Fibre Channel Adapter is a device that is connected to a workstation, server, or host system and control the protocol for communications.

Hubs

Fibre Channel hubs are used to connect up to 126 nodes into a logical loop. All connected nodes share the bandwidth of this one logical loop. Each port on a hub

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contains a Port Bypass Circuit(PBC) to automatically open and close the loop to support hot pluggability.

Switched Fabric

Switched fabric is the highest performing device available for interconnecting large number of devices, increasing bandwidth, reducing congestion and providing aggregate throughput.

Each device is connected to a port on the switch, enabling an on-demand

connection to every connected device. Each node on a Switched fabric uses an aggregate throughput data path to send or receive data.

1.3.4 LUN Masking

LUN masking is a RAID system-centric enforced method of masking multiple LUNs behind a single port. By using World Wide Port Names (WWPNs) of server HBAs, LUN masking is configured at the volume level. LUN masking also allows s h a r i ng disk storage resource across multiple independent servers. A single large RAID device can be sub-divided to serve a number of different hosts that are attached to the RAID through the SAN fabric with LUN masking. So that only one or a limited number of servers can see that LUN, each LUN inside the RAID device can be limited.

LUN masking can be done either at the RAID device (behind the RAID port) or at the server HBA. It is more secure to mask LUNs at the RAID device, but not all RAID devices have LUN masking capability. Therefore, in order to mask LUNs, some HBA vendors allow persistent binding at the driver-level.

1.4 Array Definition

1.4.1 Raid Set

A Raid Set is a group of disk drives containing one or more logical volumes called Volume Sets. It is not possible to have multiple Raid Sets on the same disk drives.

A Volume Set must be created either on an existing Raid Set or on a group of available individual disk drives (disk drives that are not yet a part of a Raid Set). If there are existing Raid Sets with available raw capacity, new Volume Set can be created. New Volume Set can also be created on an existing Raid Set without free raw capacity by expanding the Raid Set using available disk drive(s) which is/are not yet Raid Set member. If disk drives of different capacity are grouped together in a Raid Set, then the capacity of the smallest disk will become the effective capacity of all the disks in the Raid Set.

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1.4.2 Volume Set

A Volume Set is seen by the host system as a single logical device. It is organized in a RAID level with one or more physical disks. RAID level refers to the level of data performance and protection of a Volume Set. A Volume Set capacity can consume all or a portion of the ra w capacity available in a Raid Set. Multiple Volume Sets can exist on a group of disks in a Raid Set. Additional Volume Sets created in a specified Raid Set will reside on all the physical disks in the Raid Set. Thus each Volume Set on the Raid Set will have its data spread evenly across all the disks in the Raid Set. Volume Sets of different RAID levels may coexist on the same Raid Set.

In the illustration below, Volume 1 can be assigned a RAID 5 level while Volume 0 might be assigned a RAID 0+1 level.

1.5 High Availability

1.5.1 Creating Hot Spares

A hot spare drive is an unused online available drive, which is ready to replace a failed disk drive. In a RAID level 1, 0+1, 3, 5, 6, 30, 50, or 60 Raid Set, any unused online available drive installed but not belonging to a Raid Set can be defined as a hot spare drive. Hot spares permit you to replace failed drives without powering down the system. When the RAID subsystem detects a drive failure, the system will do automatic and transparent rebuild using the hot spare drives. The Raid Set will be reconfigured and rebuilt in the background while the RAID subsystem continues to handle system request. During the automatic rebuild process, system activity will continue as normal, however, the system performance and fault tolerance will be affected.

IMPORTANT: The hot spare must have at least the same or more capac it y a s t he drive it replaces.

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1.5.2 Hot-Swap Disk Drive Support

The RAID subsystem has built-in protection circuit to support the replacement of SATA II hard disk drives without having to shut down or reboot the system. The removable hard drive tray can deliver “hot swappable” fault-tolerant RAID solution at a price much less than the cost of conventional SCSI hard disk RAID subsystems. This feature is provided in the RAID subsystem for advance fault tolerant RAID protection and “online” drive replacement.

1.5.3 Hot-Swap Disk Rebuild

The Hot-Swap feature can be used to rebuild Raid Sets with data redundancy such as RAID level 1, 0+1, 3, 5, 6, 30, 50 and 60. If a hot spare is not available, the failed disk drive must be replaced with a new disk drive so that the data on the failed drive can be rebuilt. If a hot spare is available, the rebuild starts automatically when a drive fails. The RAID subsystem automatically and transparently rebuilds failed drives in the background with user-definable rebuild rates. The RAID subsystem will automatically continue the rebuild process if the subsystem is shut down or powered off abnormally during a reconstruction process.

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Chapter 2 Identifying Parts of the RAID Subsystem

The illustrations below identify the various parts of the system. Familiarize yourself with the parts and terms as you may encounter them later in the later chapters and sections.

2.1 Main Components

2.1.1 Front View

2.1.1.1 Disk Tray

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HDD Status Indicator

Part

Function

HDD Activity LED

This LED will blink blue when the hard drive is being accessed.

HDD Fault LED

Green LED indicates power is on and hard drive status is good for this slot. If there is no hard drive, the LED is Red. If hard drive defected in this slot or the hard drive is failure, the LED is blinking red.

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2.1.1.2 LCD Front Panel

Smart Function Front Panel

The smart LCD panel is a n option to configure the RAID subsystem. If you are configuring the subsystem using the LCD panel, press the Select button to login and configure the RAID subsystem.

Parts Function

Up and Down Arrow buttons

Use the Up or Down arrow keys to go through the information on the LCD screen. This is also used to move between each menu when you configure the subsystem.

NOTE: When the Down Arrow button

is pressed 3 times, the LCD control will shift to the other RAID controller (in redundant controller mode) and the other RAID controller’s IP address will be shown in LCD.

Select button

This is used to enter the option you have selected.

Exit button EXIT

Press this button to return to the previous menu.

NOTE: This button can also be used to reset

the alarm beeper. For example, if one power supply fails, pressing this button will mute the beeper.

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Environment Status LEDs

Parts Function

Power LED Green LED indicates power is ON.

Power Fail LED

If a redundant power supply unit fails, this LED will turn to RED and alarm will sound.

Fan Fail LED

When a fan fails or the fan’s rotational speed is below 1500RPM, this LED will turn red and an alarm will sound.

Over Temperature LED

If temperature irregularities in the system occurs (HDD slot temperature over 65°C, Controller temperature over 70°C), this LED will turn RED and alarm will sound.

Voltage Warning LED

An alarm will sound warning of a voltage abnormality and this LED will turn red.

Activity LED

This LED will blink blue when the RAID subsystem is busy or active.

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2.1.1.3 LCD IP Address in Dual Controller Mode

In dual controller mode, the RAID subsystem has 2 IP addresses which can be accessed separately.

By default, the IP address of Controller 1 is shown.

To view the IP address of Controller 2, press the “Down Arrow”

button in the

front panel three (3) times.

When the IP address of Controller 1 is shown, there is no blinking rectangular character at the end of the IP address.

When the IP address of Controller 2 is shown, there is a blinking rectangular character at the end of the IP address.

When the IP address has a link (connected to network), there is an “*” at the end of the IP address. When there is no link, there is no “*”.

Controller 1 IP Address (No rectangular character)

Controller 1 has Link Controller 1 has no Link

Controller 2 IP Address (With rectangular character blinking)

Controller 2 has Link Controller 2 has no Link

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2.1.2 Rear View

Single Controller

Dual Controller

Controller Module – The subsystem has single or dual controller module.

Power Supply / Fan Module #1, #2 – Two power supply / fan modules are

located at the rear of the subsystem.

If the power supply fails to function, the

Power Fail LED will turn red and an alarm will sound. An error message will also appear on the LCD screen warning of power failure.

The fan in a power supply fan module is powered independently. When a power supply fails, the fan will still be working and provides airflow inside the enclosure.

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2.2 Controller Module

The EPICa RAID system includes a dual 4Gb FC-to-SAS/SATA II RAID Controller Module.

RAID Controller Module

2.2.1 Controller Module Panel

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Part Description

Host Channel A, B

There are two Fibre host channels (A and B) which can be use to connect to Fibre HBA on the Host system, or to connect to FC switch.

SAS Expansion Port

Use for expansion; connect to the SAS In Port of a JBOD subsystem.

Debug Port

RJ-11 port; Use to check controller debug messages.

Monitor Port

RJ-11 port; Use to manage the RAID subsystem via serial terminal console.

R-Link Port

10/100 Ethernet RJ-45 port; Use to manage the RAID subsystem via network and web browser.

Indicator LED Color Description

Green

Link LED: Indicates Host Channel has connected or linked.

Host Channel A, B Status LEDs: Link LED and Activity LED

Blink Blue

Activity LED: Indicates the Host Channel is busy and being accessed.

Green Indicates expander has connected or linked. SAS Expander Activity LED

Blue

Indicates the expander is busy and being accessed.

Fault LED

Blink

RED

Indicates that controller has failed.

Blink

Green

Indicates that controller is working fine.

CTRL Heartbeat LED

Solid

Green

Indicates that controller is hung.

In replacing the failed Controller Module, refer to section 6.3.1 of this manual.

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2.3 Power Supply / Fan Module (PSFM)

The RAID subsystem contains two 400W Power Supply / Fan Modules. All the Power Supply / Fan Modules (PSFMs) are inserted into the rear of the chassis.

2.3.1 PSFM Panel

The panel of the Power Supply/Fan Module contains: the Power On/Off Switch, the AC Inlet Plug, and a Power On/Fail Indicator showing the Power Status LED, indicating ready or fail.

Each fan within a PSFM is powered independently of the power supply within the same PSFM. So if the power supply of a PSFM fails, the fan associated with that PSFM will continue to operate and cool the enclosure.

When the power cord connected from main power source is inserted to the AC Power Inlet, the power status LED becomes RED. When the switch of the PSFM is turned on, the LED will turn GREEN. When the Power On/Fail LED is GREEN, the PSFM is functioning normally.

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NOTE: Each PSFM has one Power Supply and one Fan. PSFM 1 has Power#1 and Fan#1, and PSFM 2 has Power#2 and Fan#2. When the Power Supply of a PSFM fails, the PSFM need not be removed from the slot if replacement is not yet available. The fan will still work and provide necessary airflow inside the enclosure.

In replacing the failed PSFM, refer to section 6.3.2 of this manual.

NOTE: After replacing the Power Supply Fan Module and turning on the Power On/Off Switch of the PSFM, the Power Supply will not power on immediately. The Fans in the PSFM will spin-up until the RPM becomes stable. When Fan RPM is already stable, the RAID controller will then power on the Power Supply. This process takes more or less 30 seconds. This safety measure helps prevent possible Power Supply overheating when the Fans cannot work.

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Chapter 3 Getting Started with the Subsystem

3.1 Powering On

1. Plug in the power cords into the AC Power Input Socket located at the rear of the

subsystem.

NOTE: The subsystem is equipped with redundant, full range power supplies with PFC (power factor correction). The system will automatically select voltage.

2. Turn on each Power On/Off Switch to power on the subsystem.

3. The Power LED on the front Panel will turn green.

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3.2 Disk Drive Installation

This section describes the physical locations of the hard drives supported by the subsystem and give instructions on installing a hard drive. The subsystem supports hot-swapping allowing you to install or replace a hard drive while the subsystem is running.

3.2.1 Installing a SAS Disk Drive in a Disk Tray

NOTE: These steps are the same when installing SATA disk drive in Single Controller Mode.

1. Press the Tray Open button and the Disk Tray handle will flip open.

2. Pull out an empty disk tray. Pull the handle outwards to remove the tray from the

enclosure.

3. Place the hard drive in the disk tray. Make sure the holes of the disk tray align

with the holes of the hard drive.

Tray Open Button

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4. Install the mounting screws on the bottom part to secure the drive in the disk

tray.

5. Slide the tray into a slot.

6. Press the lever in until you hear the latch click into place. The HDD Fault LED will

turn green when the subsystem is powered on and HDD is good.

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3.2.2 Installing a SATA Disk Drive (Dual Controller Mode) in a Disk Tray

1. Remove an empty disk tray from the subsystem.

2. Prepare the dongle board and two screws.

3. Place the dongle board in the disk tray. Turn the tray upside down. Tighten two

screws to secure the dongle board into the disk tray.

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4. Place the SATA disk drive into the disk tray. Slide the disk drive towards the

dongle board.

5. Turn the disk tray upside down. To secure the disk drive into the disk tray,

tighten four screws on the holes of the disk tray. Note in the picture below where the screws should be place in the disk try holes.

6. Insert the disk tray into the subsystem.

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Chapter 4 RAID Configuration Utility Options

Configuration Methods

There are fou r methods of configuring the RAID controller:

VT100 terminal connected through the serial Monitor port

Front panel touch-control buttons

Web browser-based remote RAID management via the R-Link Ethernet port

Telnet connection via the R-Link Ethernet port

NOTE: The RAI D su b system allows you to access using only one method

at a time. You cannot use more than one method at the

same time.

4.1 Configuration through Terminal

Configuring through a terminal will allow you to use the same configuration options

and functions that are available from the LCD panel and via Telnet. To start-up:

1. Connect the Monitor port located at the rear of the system to a PC or a VT100

compatible terminal operating in an equivalent terminal emulation mode using serial

cable.

NOTE: You may connect a terminal while the system’s power is on.

2. Power-on the terminal.

3. Run the VT100 program or an equivalent terminal program.

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4. The default setting of the monitor port is 115200 baud rate, 8 data bit, non-parity, 1

stop bit and no flow control.

5. Click

disconnect button.

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Open the File menu, and then open Properties

7. Open the Settings Tab.

8. Configure the settings as follows:

“ Function, arrow and ctrl keys act as”: Terminal Keys “ Backspace key sends”: Crtl + H “Emulation”: VT100 “Telnet terminal ID”: VT100 “Back scroll buffer lines”: 500 Click OK.

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9. Now, the VT100 is ready to use. After you have finished the VT100 Terminal setup,

you may press t he “X” key (in your Terminal) to link the RAID subsystem and Terminal together. Press “X” key to display the disk array Monitor Utility screen on your VT100 Terminal.

10.

The Main Menu will appear.

Keyboard Function Key Definitions

“A” key - to move to the line above

“Z” key - to move to the next line

“Enter” key - Submit selection function

“ESC” key - Return to previous screen

“L” key - Line draw

“X” key – Redraw

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Main Menu

The main menu shows all function that enables the customer to execute actions by clicking on the appropriate link.

NOTE: The password option allows user to set or clear the RA ID s ub s y s t em’ s password protection feature. Once the password has been set, the user can only monitor and configure the RAID subsystem by providing the correct password. The password is used to protect the RAID subsystem from unauthorized acce s s . The controller will check the password only when entering the Main menu from the initial screen. The RAID subsystem will automatically go back to the initial screen when it does not receive any command in twenty seconds. The RAID subsystem’s factory default password is set to 00000000.

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VT100 Terminal Configuration Utility Main Menu Options

Select an option and the related information or submenu items under it will be displayed. The submenus for each item are shown in Section 4.2.1. The configuration

utility main

menu options are:

Option Description

Quick Volume And Raid Set Setup

Create a RAID configuration which consists of all physical disks installed

Raid Set Functions

Create a customized Raid Set

Volume Set Functions

Create a customized Volume Set

Physical Drive Function s

View individual disk information

Raid System Functions

Setting the Raid system configurations

Hdd Power Management

Setting the HDD power management configurations

Fibre Channel Config

Setting the Fibre Channel configurations

Ethernet Configuration

Setting the Ethernet configurations

Views System Events

Record all system events in the buffer

Clear Event Buffer

Clear all event buffer information

Hardware Monitor

Show all system environment status

System Information

View the controller information

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4.2 Configuration through the LCD Panel

All configurations can be performed through the LCD Display front panel function keys, except for the “Firmware update”. The LCD provides a system of screens with areas for information, status indication, or menus. The LCD screen displays menu items or other information up to two lines at a time. The RAID controller’s factory default password is set to 00000000.

Function Key Definitions

The four function keys at side of the front panel perform the following functions:

Parts Function

Up and Down Arrow buttons

Use the Up or Down arrow keys to go through the information on the LCD screen. This is also used to move between each menu when you configure the subsystem.

NOTE: When the Down Arrow button

is pressed 3 times, the LCD control will shift to the other RAID controller (in redundant controller mode) and the other RAID controller’s IP address will be shown in LCD.

Select button

This is used to enter the option you have selected.

Exit button EXIT

Press this button to return to the previous menu.

NOTE: This button can also be used to reset

the alarm beeper. For example, if one power supply fails, pressing this button will mute the beeper.

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4.2.1 Menu Diagram

The following menu diagram is a summary of the various configurations and setting functions that can be accessed through terminal. The LCD panel menus also have similar functions except Update Firmware.

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4.3 Configuration through web browser-based proRAID Manager

The RAID subsystem can be remotely configured via R-Link port with proRAID Manager, a web browser-based application. The proRAID Manager can be used to manage all available functions of the RAID controller.

To configure the RAID subsystem from a remote machine, you need to know its IP Address. Launch your web browser from remote machine and enter in the address bar:

http://[IP-Address].

IMPORTANT! The default IP address of Controller 1 R-Link Port is

192.168.1.100 and the defau l t IP a dd re s s o f Con tr o ll er 2 R- Li n k P or t is

192.168.1.101 and subnet mask is 255.255.255.0. DHCP client function is also enabled by default. You can reconfigure the IP Address or disable the DHCP client function through the LCD front pa nel or terminal “Ethernet Configuration” menu.

NOTE: If DHCP client function is enabled but a DHCP server is unavailable and the IP address is changed, a Controller Restart is necessary. If the DHCP client function is disabled and the IP address is changed, Controller Restart is not needed.

Note that you may need to be logged in as administrator with local admin rights on the remote machine to remotely configure the RAID subsystem. The RAID subsystem controller default User Name is “admin” and the Password is “00000000”.

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Main Menu

The main menu shows all av ailable function that user can execute by clicking on the appropriate hyperlink.

Individual Category

Description

Quick Function

Create a RAID configuration, which consists of all physical disks installed. The Volume Set Capacity, Raid Level, and Stripe Size can be modified during setup.

Raid Set Functions

Create customized Raid Sets.

Volume Set Functions

Create customized Volume Sets and allow modification of parameters of existing Volume Sets parameter.

Physical Drives

Create pass through disks and allow modification of parameters of existing pass through drives. This also provides a function to identify a disk drive.

System Controls

For setting the RAID system configurations.

Information

To view the controller and hardware monitor information. The Raid Set hierarchy can also be viewed through the Raid Set Hierarchy item.

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Chapter 5 RAID Management

5.1 Quick Function

5.1.1 Quick Create

The number of physical drives in the RAID subsystem determines the RAID levels that can be implemented with the Raid Set. This feature allows user to create a Raid Set associated with exactly one Volume Set. User can change the Raid Level, Capacity, Volume Initialization Mode and Stripe Size. A hot spare can also be created depending upon the existing configuration.

If the Volume Set size is over 2TB, an option “Greater Two TB Volume Support” will be automatically provided in the screen as shown in the example below. There are three options to select: “No”, “64bit LBA”, and “4K Block”).

Greater Two TB Volume Support: No: Volume Set capacity is set to maximum 2TB.

64bit LBA: Use this option for UNIX, Linux Kernel 2.6 or later, Windows Server 2003 +

SP1 or later versions, Windows x64, and other supported operating systems. The maximum Volume Set size is up to 512TB.

4K Block: Use this option for Windows OS such as Windows 2000, 2003, or XP. The maximum Volume Set size is 16TB. Just use the Volume as “Basic Disk”. Volume can’t be used as “Dynamic Disk”; also can’t be used in 512Bytes block service program.

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Tick on the Confirm The Operation option and click on the Submit button in the Quick Create screen. The Raid Set and Volume Set will start to initialize.

You can use RaidSet Hierarchy feature to view the Volume Set information (Refer to Section 5.6.1).

NOTE: In Quick Create, your Raid Set is automatically configured based on the number of disks in your system (maximum 32 disks per Raid Set). Use the Raid Set Function a nd Volume Set Function if you prefer to crea te customized Raid Set and Volume Set.

NOTE: In Quick Create, the Raid Level options 30, 50, and 60 are not available. If you need to create Volume Set with Raid Level 30, 50, or 60, use the Create Raid Set function and Create Volume Set function.

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5.2 RAID Set Functions

Use the Raid Set Function and Volume Set Function if you prefer to create customized Raid Sets and Volume Sets. User can manually configure and take full control of the Raid Set settings, bu t it wi ll ta ke a little lo nge r to se tup tha n the Qui ck Create configuration. Select the Raid Set Function to manually configure the Raid Set for the first time or to delete existing Raid Set and reconfigure a Raid Set.

5.2.1 Create RAID Set

To create a Raid Set, click on the Create RAID Set link. A “Select The Drives For RAID Set” screen is displayed showing the dis k drives in the system. Ti ck the box o f e ach di s k drive t h at wil l b e inc l u ded in Raid Set to be created. Enter the preferred Raid Set Name (1 to 16 alphanumeric characters) to define a unique identifier for the Raid Set. Default Raid Set name always appear as Raid Set # xxx.

Tick on the Confirm The Operation option and click on the Submit button in the screen.

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5.2.2 Delete RAID Set

To delete a Raid Set, click on the Delete RAID Set link. A “Select The Raid Set To Delete” screen is displayed showing all Raid Sets existing in the system. Select the Raid Set you want to delete in the Select column.

Tick on the Confirm The Operation and click on the Submit button to process with deletion.

NOTE: You cannot delete a Raid Set containing a Raid 30/50/60 Volume Set. You must delete the Raid 30/50/60 Volume Set first.

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5.2.3 Expand RAID Set

Use this option to expand a Raid Set, when one or more disk drives is/are added to the system. This function is active when at least one drive is available.

To expand a Raid Set, click on the Expand RAID Set link. Select the Raid Set which you want to expand.

Tick on the available disk(s) and check Confirm The Operation. Click on the

Submit

button to add the selected disk(s) to the Raid Set.

NOTE: Once the Expand Raid Set process has started, user cannot stop it. The process must be completed.

NOTE: If a disk drive fails during Raid Set expansion and a hot spare is available, an auto rebuild operation will occur after the Raid Set expansion is completed.

NOTE: A Raid Set cannot be expanded if it contains a Raid 30/50/60 Volume Set.

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Migration occurs when a disk is added to a Raid S et. Migrating status is displayed in the Raid Set status area of the Raid Set information. Migrating status is also displayed in the Volume Set status area of the Volume Set Information for all Volume Sets under the Raid Set which is migrating.

NOTE: Cannot expand Raid Set when contains Raid30/50/60 volume.

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5.2.4 Offline RAID Set

If user wants to offline (and move) a Raid Set while the system is powered on, use the Offline Raid Set function. After completing the function, the HDD state will change to “Offlined” Mode and the HDD Status LEDs will be blinking RED.

To offline a Raid Set, click on the Offline RAID Set link. A “Select The RAID SET To Offline” screen is displayed showing all existing Raid Sets in the subsystem. Select the Raid Set which you want to offline in the Select column.

Tick on the Confirm The Operation, and then click on the Submit button to offline the selected Raid Set.

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5.2.5 Activate Incomplete RAID Set

When Raid Set State is “Normal”, this means there is no failed disk drive.

When does a Raid Set State becomes “Incomplete”?

If the RAID subsystem is powered off and one disk drive is removed or has failed in power off state, and when the subsystem is powered on, the Raid Set State will change to “Incomplete”.

The Volume Set(s) associated with the Raid Set will not be visible and the failed or removed disk will be shown as “Missing”. At the same time, the subsystem will not detect the Volume Set(s); hence the volume(s) is/are not accessible.

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When can the “Activate Incomplete Raid Set” function be used?

In order to access the Volume Set(s) and corresponding data, use the Activate Incomplete RAID Set function to active the Raid Set. After selecting this

function, the Raid State will change to “Degraded” state.

To activate the incomplete the Raid Set, click on the Activate Incomplete RAID Set link. A “Select The Raid Set To Activate” screen is displayed showing all existing Raid Sets in the subsystem. Select the Raid Set with “Incomplete” state which you want to activate in the Select column.

Click on the Submit button to activate the Raid Set. The Volume Set(s) associated with the Raid Set will become accessible in “Degraded” mode.

NOTE: The “Activate Incomplete Raid Set” function is only used when Raid Set State is “Incomplete”. It cannot be used when Raid Set configuration is lost. If in case the RAID Set configuration is lost, please contact your vendor’s support engineer.

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5.2.6 Create Hot Spare

The Create Hot Spare option gives you the ability to define a global hot spare. When you choose the Create Hot Spare option in the Raid Set Function, all

unused (non Raid Set member) disk drives in the subsystem appear. Select the target disk drive by clicking on the appropriate check box. Tick on the Confirm The

Operation and click on the Submit button to create hot spare drive(s).

NOTE: The capacity of the hot spare disk(s) must be equal to or greater than the smallest hard disk size in the subsystem so that it/they can replace any failed disk drive.

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5.2.7 Delete Hot Spare

Select the target Hot Spare disk(s) to delete by clicking on the appropriate check box. Tick on the Confirm The Operation, and click on the Submit button in the screen to

delete the hot spare(s).

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5.2.8 Rescue Raid Set

If you need to recover a missing Raid Set using the “Rescue Raid Set” function, please contact your vendor’s support engineer for assistance.

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5.3 Volume Set Function

Volume Set is seen by the host system as a single logical device. It is organized in a RAID level with one or more physical disks. RAID level refers to the level of data performance and protection of a Volume Set. A Volume Set capacity can consume all or a portion of the raw capacity available in a Raid Set.

Multiple Volume Sets can exist on a group of disks in a Raid Set. Additional Volume Sets created in a specified Raid Set will reside on all the physical disks in the Raid Set. Thus each Volume Set on the Raid Set will have its data spread evenly across all the disks in the Raid Set.

5.3.1 Create Volume Set

The following are the Volume Set features:

1. Volume sets of different RAID levels may coexist on the same Raid Set.

2. Up to 128 Volume Sets in a Raid Set can be created in the RAID sub sys tem .

To create Volume Set from a Raid Set, expand the Volume Set Functions in the main menu and click on the Create Volume Set link. The Select The Raid Set To Create On It screen will show all existing Raid Sets. Tick on the Raid Set where you want to create the Volume Set and then click on the Submit button.

The Volume Set se tup screen allows user to configure the Volume Name, Capacity, RAID level, Initialization Mode, Stripe Size, Cache Mode, Tagged Command Queuing, Fibre Channel/LUN Base/LUN, and Volume To Be Created.

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Vo l um e N am e :

The default Volume Set name will appear as “Volume---VOL#XXX”. You can rename the Volume Set name provided it does not exceed the 16 characters limit.

Volume Raid Level:

Set the RAID level for the Volume Set. Click the down-arrow in the drop-down list. The available RAID levels for the current Volume Set are displayed. Select the preferred RA ID level.

Select Volume Capacity:

The maximum Volume Set size is displayed by default. If necessary, change the Volume Set size appropriate for your application.

Greater Two TB Volume Support:

If the Volume Set size is over 2TB, an option “Greater Two TB Volume Support” will be automatically provided in the screen as shown in the example above. There are three options to select: “No”, “64bit LBA”, and “4K Block”).

No: Volume Set size is set to maximum 2TB limitation. 64bit LBA: Use this option for UNIX, Linux Kernel 2.6 or later, Windows Server 2003

+ SP1 or later versions, Windows x64, and other supported operating systems. The maximum Volume Set size is up to 512TB.

Initialization Mode:

Set the Initialization Mode for the Volume Set. Initialization in Foreground mode is completed faster but must be completed before Volume Set becomes accessible. Background mode makes the Volume Set instantly available but the initialization process

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takes longer. No Init (To Rescue Volume) is used to create a Volume Set without initialization; normally used to recreate Volume Set configuration to recover data.

Stripe Size:

This parameter sets the size of the stripe written to each disk in a RAID 0, 1, 0+1, 5 or 6 Volume Set. You can set the stripe size to 4 KB, 8 KB, 16 KB, 32 KB, 64 KB, or 128 KB.

A larger stripe size produces better-read performance, especially if your computer does mostly sequential reads. However, if you are sure that your computer does random reads more often, select a small stripe size.

NOTE: Stripe Size in RAID level 3 can’t be modified.

Cache Mode:

The RAID subsystem supports two types of write caching: Write-Through and Write-Back.

Write-Through: data are both written to the cache and the disk(s) before the write

I/O is acknowledged as complete.

Write-Back: when data is written to cache, the I/O is acknowledged as complete,

and some time later, the cached data is written or flushed to the disk(s). This provides better performance but requires a battery module support for the cache memory, or a UPS for the subsystem.

Tagged Command Queuing:

When this option is enabled, it enhances the overall system performance under multitasking operating systems by reordering tasks or requests in the command queue of the RAID system. This function should normally remain enabled.

Fibre Channel/LUN Base/LUN:

Fibre Channel: Each RAID controller has two 4Gbps Fibre Host Channels (ports).

Select the Fibre port where

to map the LUN (Volume Set). Options are: 0, 1 and

0&1 Cluster. “0&1 Cluster” will make the LUN visible on both Fibre ports.

LUN Base: T h e b ase LUN number. Each LUN Base supports 8 LUNs. LUN: Each Volume Set must be assigned a unique LUN ID number. A Fibre Port can

connect up to 128 devices (LUN ID: 0 to 127). Select the LUN ID for the

Volume Set.

NOTE: Refer to Appendix 1 for more information about mapping LUNs/Volumes to Host Channel/Port in Dual Controller Mode.

Volume s To Be Created:

Use this option to create several Volume Sets with the same Volume Set attributes. Up to 128 Volume Sets can be created.

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5.3.2 Create Raid 30/50/60

To create a Raid30/50/60 Volume Set, move the mouse cursor to the main menu and click on the Create Raid30/50/60 link. The Select Multiple RaidSet For Raid30/50/60 screen will show all Raid Sets. Tick on t he Raid Sets that you want to include in the creation and then click on the Submit button.

NOTE: When creating Raid 30/50/60 Volume set, you need to create first the Raid Sets. Up to 8 Raid Sets maximum is supported in Raid 30/50/60. All Raid Sets must contain the same n umber of disk drives.

Configure the Volume Set attributes (refer to previous section for the Volume Set attributes). When done, tick Confirm The Operation and click on Submit button.

NOTE: Refer to Section 5.3.1 Create Volume Set for detailed information about the Volume Set settings.

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5.3.3 Delete Volume Set

To delete a Volume S et, select the Volume Set Functions in the main menu and click on the Delete Volume Set link. The Select The Volume Set To Delete screen will show all available Raid Sets. Tick on a Raid Set and check the Confirm The Operation option and then click on the Submit button to show all Volume Sets in the selected Raid Set. Tick on a Volume Set and che ck the Confirm The Operation option. Click on the Submit button to

delete the Volume Set.

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5.3.4 Modify Volume Set

Use this function to modify Volume Set configuration.

To modify the attributes of a Volume Set:

1. Click on the Modify Vo lume Set link.

2. Tick from the list the Volume Set you want to modify. Click on the Submit button.

The following screen appears.

To modify Volume Set attribute values, select an attribute item and click on the attribute value. After completing the modification, tick on the Confirm The Operation option and click on the Submit button to save the changes.

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5.3.4.1 Volume Set Expansion

Volume Capacity (Logical Volume Concatenation Plus Re-stripe)

Use the Expand Raid Set function to expand a Raid Set when a disk is added to your subsystem. (Refer to Section 5.2.3)

The expanded capacity can be used to enlarge the Volume Set size or create another Volume Set. Use the Modify Volume Set function to expand the Volume Set capacity. Select the Volume Set and move the cursor to the Volume Set Capacity item and enter the capacity size.

Tick on the Confirm The Operation and click on the Submit button to complete the action. The Volume Set starts to expand.

NOTE: The Volume Set capacity of Raid30/50/60 cannot be expanded.

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5.3.4.2 Volume Set Migration

M i gr a t i o n o c c u r s w h e n a V o l u m e S e t mi g r a t e s f r om o n e R A I D l e v e l t o a n ot h e r , a Volume Set stripe size changes, or when a disk is added to a Raid Set. Migrating status is displayed in the Volume Set status area of the RaidSet Hierarchy screen during migration.

NOTE: The Stripe Size of a Raid30/50/60 Volume Set cannot be modified.

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5.3.5 Check Volume Set

Use this function to perform Volume Set consistency check, which verifies the correctness of redundant data (data blocks and parity blocks) in a Volume Set. This basically means computing the parity from the data blocks and comparing the results to the contents of the parity blocks, or computing the data from the parity blocks and comparing the results to the contents of the data blocks.

NOTE: The Volume Set state must be Normal in order to perform Check V olume Set. Only RAID levels with parity (redu ndant data) such as RAID Levels 3, 5, 6, 30, 50, and 60 support this function.

To perform Check Volume Set function:

1. Click on the Check Volume Set link.

2. Tick from the list the Volume Set you want to check. Select the Check Volume Set options.

Check Volume Set Options:

 Scrub Bad Block If Bad Block Found, Assume Parity Data is Good  Re-compute Parity if Parity E rror, Assume Da ta is Good

NOTE: When the 2 options a re not select ed, it will only check for errors. It is recommended to perform Check Volume Set with the 2 options unselected at first. If the result shows errors, the data must be backed up t o a safe storage . Then the two options can be selected and redo Check Volume Set to correc t the errors.

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3. Tick on Confirm The Operation and click on the Submit button. The Checking process will be started.

The checking percentage can also be viewed by clicking on RaidSet Hierarchy in the Information menu.

NOTE: The result of Check Volume Set function is shown in System Events Information and Volume Set Information. In System Events Information, it is shown in the Errors column. In Volume Set Information, it is shown in Errors Found field.

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5.3.6 Schedule Volume Check

To perform Check Volume Set by schedule, follow these steps:

1. Click on the Schedule Volume Check link.

2. Select the desired schedule that you wish the Check Volume Set function to run.

Tick on Confirm The Operation and click on the Submit button.

Scheduler: Disabled, 1Day (For Testing), 1Week, 2Weeks, 3Weeks, 4Weeks, 8Weeks,

12Weeks, 16Weeks, 20Weeks and 24Weeks.

Check After System Idle: No, 1 Minute, 3 Minutes, 5 Minutes, 10 Minutes, 15

Minutes,

20 Minutes, 30 Minutes, 45 Minutes and 60 Minutes.

NOTE: To verify the Volume Check schedule, go to Information -> RAID Set Hierarchy -> select the Volume Set -> the Volume Set Information will be displayed.

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5.3.7 Stop Volume Check

Use this option to stop all Volume Set consistency checking process/processes.

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5.4 Physical Drive

Choose this option from the Main Menu to select a disk drive and to perform the functions listed below.

5.4.1 Create Pass-Through Disk

A Pass-Through Disk is a disk drive not controlled by the internal RAID subsystem firmware and thus cannot be a part of a Volume Set. A Pass-Through disk is a separate and individual Raid Set. The disk is available to the host as an individual disk. It is typically used on a system where the operating system is on a disk not controlled by the RAID firmware.

To create pass-through disk, click on the Create Pass-Through link under the Physical Drives main menu. The setting function screen appears.

Select the disk drive to be made as Pass-Through Disk and configure the PassThrough Disk attributes, such as the Cache Mode, Tagged Command Queuing, and Fibre Channel/LUN Base/LUN for this volume.

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5.4.2 Modify a Pass-Through Disk

Use this option to modify the attribute of a Pass-Through Disk. User can modify the Cache Mode, Tagged Command Queuing, and Fibre Channel/LUN Base/LUN on an existing Pass-Through Disk.

To modify the Pass-Through drive attribute from the Pass-Through drive pool, click on the Modify a Pass-Through Disk link. The “Select The Pass-Through Disk For Modification” screen appears. Tick on the Pass-Through Disk from the Pass-Through drive pool and click on the Submit button to select the drive.

The Enter Pass-Through Disk Attribute screen appears. M odify the drive attribute values as you want.

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5.4.3 Delete Pass-Through Disk

To delete Pass-Through Disk from the Pass-Through drive pool, click on Delete Pass-Through link. Select a Pass-Through Disk, tick on the Confirm The Operation and click the Submit button to complete the delete action.

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5.4.4 Identify Enclosure

To identify an Enclosure, move the mouse cursor and click on Identify Enclosure link. The Select The Enclosure For Identification screen appears. Tick on the enclosure from the list of enclosures, then click on the Submit button to identify the selected enclosure. All disk drives’ LEDs in an enclosure will flash when a particular enclosure is selected.

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5.4.5 Identify Selected Drive

Use this option to physically locate a selected drive to prevent removing the wrong drive. When a disk drive is selected using the Identify Drive function, the Status LED of the selected disk drive will be blinking.

To identify a selected drive from the drives pool, click on the Identify Drive link. The “Select The IDE Device For identification” screen appears. Tick on the IDE device from the drives list. After completing the selection, click on the Submit button to identify selected drive.

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5.5 System Controls

5.5.1 System Configuration

To set the RAID subsystem system configuration options, click the System Configuration link under the System Controls menu. The System

Configurations screen will be shown. Set the desired system option as needed.

System Beeper Setting:

This option is used to Disable or Enable the system’s RAID controller alarm beeper.

Background Task Priority:

The Background Task Priority indicates how much time and system resource the RAID controller devotes to a background task, such as a rebuild operation. The RAID subsystem allows user to choose the background task priority (High 80%, Medium 50%, Low 25%, and Ultra Low 5%) to balance between background task process and Volume Set access. For high RAID s u bsys t em performance, specify a low value.

JBOD/RAID Configuration:

The RAID subsystem supports JBOD and RAID configuration.

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SATA NCQ Support:

NCQ is a command protocol in Serial ATA that can only be implemented on native Serial ATA hard drives. It allows multiple commands to be outstanding within a drive at the same time. Drives that support NCQ have an internal queue where outstanding commands can be dynamically rescheduled or re-ordered, along with the necessary tracking mechanisms for outstanding and completed portions of the workload. Disabled or Enable the SATA NCQ function.

HDD Read Ahead Cache:

This option allows the users to disable the cache of the HDDs on the RAID subsystem. In some HDD models, disabling the cache in the HDD is necessary to prove the RAID subsystem functions correctly.

Volume Data Read Ahead:

This option allows the users to set the Volume Data Read Ahead function. Options are: Normal, Aggressive, Conservative, and Disabled.

HDD Qu eu e D epth :

The queue depth is the number of I/O operations that can be run in parallel on a disk drive. HDD Queue Depth options are 1, 2, 4, 8, 16, and 32.

Disk Write Cache Mode:

The RAID subsystem supports Disk Write Cache Mode options: Auto, Enabled, and Disabled. If the RAID subsystem has BBM (battery backup module), selecting the Auto option will automatically enable Disk Write Cache. On the other hand, if there is no BBM, the Auto option will disable Disk Write Cache.

Disk Capacity Truncation Mode:

The RAID subsystem use drive truncation so that drives from different vendors are more likely to be able to be used as spares for each other. Drive truncation slightly decreases the usable capacity of a drive that is used in the subsystem. Options are:

Multiples Of 10G: If you have several 120GB drives from different vendors, chances are that the capacity varies slightly. For example, one drive might be

121.1 GB, and the other 120.4 GB. This drive truncation mode makes the

121.1 GB and 120.4 GB drives same capacity as 120 GB so that one could replace the other.

Multiples Of 1G: If you have 120 GB drives from different vendors, chances are that the capacity varies slightly. For example, one drive might be 121.1 GB, and the other 121.4 GB. This drive truncation mode makes the 121.1 GB and 121.4 GB drives same capacity 121 GB so that one could replace the other.

No Truncation:

The capacity of the disk drive is not truncated.

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5.5.2 HDD Power Management

MAID (Massive Array of Idle Disks) is a storage technology that employs a large group of disk drives in which only those drives in active use are spinning at an y given time.

This reduces power consumption and prolongs the lives of the drives.

MAID is designed for Write Once, Read Occasionally (WORO) applications such as Data Backup, Document, Mail server, and so on. MAID technology focuses on "Green Storage Concept" to save power consumption and enhance disk drives effective usage, i.e., "disk drives are spun down when there is no activity or I/O on the drives".

In the RAID subsystem, MAID is implemented in the HDD Power Management menu. Using the Advanced Power Management (APM) function of disk drives, HDD Power Management has three options (MAID Levels): (Level 1) Place idle drives in Lower Power Mode, where the drives’ heads are unloaded; (Level 2) Place idle drives in Low RPM Mode, where drives’ heads are unloaded and slows down to around 4000 RPM; and (Level 3) Spin down idle drives, where drives stops spinning and goes into sleep mode.

Stagger Power On Control: This option allows the RAI D s u b s ys t e m ’ s power supply to power up in succession

each HDD in the RAID subsystem. In the past, all the HDDs on the RAID subsystem are powered up altogether at the same time. Th is fu nc ti on al lo ws the power transfer time (lag time) from the last HDD to the next one be set within the range of

0.4 to 6.0 seconds. Default is 0.7 seconds.

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Time to HDD Low Power Idle: (MAID Level 1)

This option enables the RAID subsystem to place idle HDDs of a Raid Set in Low Power Mode, where drives’ heads are unloaded. The power consumption of the Idle HDD saving is around 15% to 20%. Recovery time is under a second. Options are: Disabled, 2, 3, 4, 5, 6, and 7 (Minutes).

Time to HDD Low RPM Mode: (MAID Level 2)

This option enables the RAID subsystem to place idle HDDs of a Raid Set in Low RPM Mode, where drives’ heads are unloaded and drive platters speed is reduced to around 4000 RPM . Th e p ow er consumption of the Idle HDD saving is from 35% to 45%. Recovery time is 15 seconds. Options are: Disabled, 10, 20, 30, 40, 50, and 60 (Minutes).

Time to Spin Down Idle HDD: (MAID Level 3) This option enables the Raid subsystem to spin down HDDs of a Raid Set after they

become idle after a preset period of time. In this level, the drives stop spinning and go into sleep mode. The power consumption of the Idle HDD saving is from 60% to 70%. Recovery time is 30 to 45 seconds. Options are: Disabled, 1 (For Test), 3, 5, 10, 15, 20, 30, 40, and 60 (Minutes).

NOTE: To verify if the disk drive you use supports MAID or APM, select “RaidSet Hierarchy” and click the disk drive (E# Slot#) link. Check in the Device Information screen if the Disk APM Support shows “Yes”.

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5.5.3 Fibre Channel Config

To set the Fibre Channel Configuration function, move the mouse cursor to the main menu and click on the Fibre Channel Config. The Fibre Channel Configuration screen will be shown. Configure the desired function.

WWNN (World Wide Node Name)

The WWNN of the FC RAID system is shown at top of the configuration screen. This is an eight-byte unique address factory assigned to the FC RAID, common to both FC ports.

WWPN (World Wide Port Name)

Each FC port has its unique WWPN, which is also factory assigned. Usually, the WWNN:WWPN tuple is used to uniquely identify a port in the Fabric.

Channel Speed

Each FC port speed can be configured either as 1 Gbps, 2 Gbps, or 4 Gbps channel. Another option is to use “Auto” for auto speed negotiation between 1Gbps/2Gbps/4Gbps. The RAID system’s default setting is “Auto”, which should be adequate under most conditions. The Channel Speed setting takes effect during the next connection. That means a link down / link up should be applied for the change to take effect. The current connection speed is shown at end of the row. You have to click the “Fibre Channel Config” link again from the menu frame to refresh the current speed information.

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Channel Topology

Each Fibre Channel can be configured to the following Topology options: Fabric, Point-to-Point, Loop or Auto. The default Topology is set to “Auto”, which takes precedence of Loop Topology. Restarting the RAID controller is needed for any topology change to take effect. The current connection topology is shown at end of the row. You have to click the “Fibre Channel Config” link again from the menu frame to refresh the current topology information. Note that current topology is shown as “None” when no successful connection is made for the channel.

Hard Loop ID

This setting is effective only under Loop topology. When enabled, you can manually set the Loop ID in the range from 0 to 125. Make sure this hard assigned ID does not conflict with other devices on the same loop, otherwise the channel will be disabled. It is a good practice to disable the hard loop ID and let the loop itself auto-arrange the Loop ID.

NOTE: For reliable operation of the RAID subsystem and depending on how the subsystem is connected, it is recommended to setup Channel Speed and Channel Topology as follows:

RAID subsystem is connected to:

Channel Speed setting:

Channel Topology setting:

4Gb FC switch 4Gb Fabric

2Gb FC switch 2Gb Fabric

4Gb FC HBA (no switch)

4Gb Loop

2Gb FC HBA (no switch)

2Gb Loop

“Fabric” topology is used when there is switch. “Loop” topology is used when there is no switch.

The Speed setting follows the FC switch speed if there is switch. If there is no FC switch, the Speed setting follows the FC HBA speed.

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5.5.4 EtherNet Configuration

To set the Ethernet configuration, click the EtherNet Configuration link under the System Controls menu. The RAID subsystem EtherNet Configuration screen will be shown. Set the desired configuration. Once done, tick on the Confirm The Operation and click the Submit button to save the settings.

NOTE: If HTTP, Telnet and SMTP Port Number is set to “0”, the service is disabled.

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5.5.5 Alert By Mail Configuration

To set the Event Notification function, click on the Alert By Mail Configuration link under the System Controls menu. The RAID subsystem Event Notification configuration screen will be shown. Set up the desired function and option. When an abnormal condition occurs, an error message will be emailed to the email recipient(s) that a problem has occurred. Events are classified into 4 levels (Urgent, Serious, Warning, and Information).

NOTE: If Event Notification by email is enabled, every 30 of event log will be sent to the email recipient(s) as one package log.

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5.5.6 SNMP Configuration

The SNMP gives users independence from the proprietary network management schemes of some manufacturers and SNMP is supported by many WAN and LAN manufacturers enabling true LAN/ WAN management integration.

To set the SNMP function, move the cursor to the main menu and click on the SNMP Configuration link. The RAID subsystem’s SNMP Configurations screen will be shown. Select the desired function and set the preferred option.

SNMP Trap Configurations: Type in the SNMP Trap IP Address box the IP address of the host system where SNMP traps will be sent. The SNMP Port is set to 162 by default.

SNMP System Configuration:

Community: Type the SNMP community. The default is public.

(1) sysContact.0, (2) sysLocation.0, and (3) sysName.0: SNMP parameter (31 bytes max). If these 3 categories are configured and when an event occurs, SNMP will send out a message that includes the 3 categories within the message. This allows user to easily define which RAID unit is having problem.

SNMP Trap Notification Configurations: Select the desired option. After completing the settings, tick on the Confirm The Operation and click on the

Submit button to save the configuration.

SNMP also works in the same way as Alert By Mail when sending event notifications.

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5.5.7 NTP Configuration

NTP stands for Network Time Protocol. It is an Internet protocol used to synchronize the clocks of computers to some time reference. Type the NTP Server IP Address to enable the RAID subsystem to synchronize with it.

To set the NTP function, move the cursor to the main menu and click on the NTP Configuration link. The RAID subsystem’s NTP Configuration screen will be displayed

. Select the desired function and configure the necessary option.

After completing the settings, tick on the Confirm The Operation and click on the Submit button to save the configuration.

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5.5.8 View Events / Mute Beeper

To view the RAID subsystem’s event log information, move the mouse cursor to the System Controls menu and click on the View Events/Mute Beeper link. The Raid Subsystem’s System Events Information screen appears.

The System Events Information screen will show: Time, Device, Event type, Elapse Time and Errors.

This function is also used to silence the beeper alarm.

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5.5.9 Generate Test Event

If you want to generate test events, move the cursor bar to the main menu and click on the Generate Test Event Link. Tick on the Confirm The Operation and click on the Submit button. Then click

on the View Events/Mute Beeper to view the test

event.

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5.5.10 Clear Event Buffer

Use this feature to clear the RAID subsystem’s System Events Information buffer.

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5.5.11 Modify Password

To change or disable the RAID subsystem’s admin password, click on the Modify Password link under the System Controls menu. The Modify System Password

screen appears.

The factory-default admin password is set to 00000000. Once the password has been set, the user or administrator can only monitor and configure the RAID subsystem by providing the correct password.

The password is used to protect the RAID subsystem’s configuration from unauthorized access. The RAID controller will check the password only when entering the Main Menu from the initial screen. The RAID subsystem will automatically go back to the initial screen when it does not receive any command after sometime.

To disable the password, enter only the original password in the Enter Original

Password box, and leave both the Enter New Password and Re-Enter New Password boxes blank. After selecting the Confirm The Operation option and

clicking the Submit button, the system password checking will be disabled. No password checking will occur when entering the main menu from the starting screen.

NOTE: The admin Password characters allowed are ‘A’ – ‘Z’, ‘a’ – ‘z’, and ‘0’ – ‘9’. The minimum number of Password characters is null/empty (Password is disabled) and maximum number of Password characters is 15.

5.5.12 Upgrade Firmware

Please refer to Section 6.2 for more information.

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5.5.13 Shutdown Controller

Use this function to shutdown the RAID Controller. This is used to flush the data from the cache memory, and is normally done before powering off the system power switch.

After shutting down the controller and still want to use the RAID subsystem, you must restart the controller either by Restart Controller function or by Power Supply On/Off switch.

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5.5.14 Restart Controller

Use this function to restart the RAID Controller. This is normally done after upgrading the controller’s firmware.

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5.6 Information Menu

5.6.1 RAID Set Hierarchy

Use this feature to view the RAID subsystem’s existing Raid Set(s), Volume Set(s) and disk drive(s) configuration and information. Select the RAID Set Hierarchy link from the Information menu to display the Raid Set Hierarchy screen.

To view the Raid Set information, click the Raid Set # link from the Raid Set Hierarchy screen. The Raid Set Information screen appears.

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To view the disk drive information, click the E# Slot# link from the Raid Set Hierarchy screen. The Device Information screen appears. This screen shows various information such as disk drive model name, serial number, firmware revision, disk capacity, timeout count, media error count, and SMART information.

To view the Volume Set information, click the Volume---VOL# link from the Raid Set Hierarchy screen. The Volume Set Information screen appears.

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5.6.2 System Information

To view the RAID subsystem’s controller information, click the System Information link from the Information menu. The Raid Subsystem Information screen appears.

NOTE: In Dual Controller mode, the System Information for the two controllers will be displayed.

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The Controller Name, Firmware Version, Serial Number, Main Processor, CPU Data/Instruction Cache size, System Memory size/speed, Current IP Address, SAS Address, Target Mode SAS Chip, Device Mode SAS Chip, SAS Expander Chip, Host Port Link Status, JBOD Port Link Status, and Dual Controller State appear in this screen.

The following are the states under Dual Controller State:

Dual Controller State Description

Single Controller is running at Single Mode.

Other Controller Added The other Controller is added and waiting to start.

Other Controller Booting The other Controller is starting up.

Other Controller Ready The other Controller has booted up and ready.

Other Controller Failed The other Controller is Failed.

Sync Controller State

The two Controllers are synchronizing their configuration or state.

Sync Controller Cache

The two Controllers are synchronizing the data in their cache memory.

Dual Operational The Controller is running.

Initialize The boot up state when Dual Controller starts up.

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