Asus PCI-DA2200 User manual

PCI-DA2200
PCI-to-Ultra2 SCSI RAID Controller
User’s Manual
Version 1.2

Copyright Information
Copyright © 1999
This edition first published 1999
All rights reserved. No part of this publication may be reproduced, trans-
mitted, transcribed, stored in a retrieval system, or translated into any
language or computer language, in any form or by any means, electronic,
mechanical, magnetic, optical, chemical, manual or otherwise, without the
prior written consent of ASUSTeK Computer Inc.
Disclaimer
ASUSTeK Computer Inc. makes no representations or warranties with res-
pect to the contents hereof and specifically disclaims any implied warranties
of merchantability or fitness for any particular purpose. Furthermore,
ASUSTeK Computer Inc. reserves the right to revise this publication and to
make changes from time to time in the content hereof without obligation to
notify any person of such revisions or changes.
Trademarks
ASUS and ASUSTeK are registered trademarks of Computer Inc.
AMD is a trademark of Advanced Micro Devices, Inc.
DEC and Alpha are registered trademarks of DIGITAL Equipment
Corporation in the U.S. and/or other countries.
Microsoft, Windows, Windows NT and MS-DOS are registered trademarks
of Microsoft Corporation in the U.S. and other countries.
Novell and NetWare are registered trademarks of Novell, Inc. in the U.S.
and/or other countries.
OS/2 and OS/2 Warp are registered trademarks of International Business
Machines Corporation in the U.S.
Solaris is a trademark of Sun Microsystems, Inc.
SCO, OpenServer, and Unix Ware are trademarks or registered trademarks
of The Santa Cruz Operation, Inc. in the U.S. and/or other countries.
All other names, brands, products or services are trademarks or registered
trademarks of their respective companies.

Contact Information
ASUSTeK COMPUTER INC. (Asia-Pacific)
Marketing Address: 150 Li-Te Road, Peitou, Taipei,
Taiwan 112
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Tech Support Tel (English): [phone] ext. 706
Tel (Chinese): [phone] ext. 701
Fax: [phone]
Email: [email protected]
Newsgroup: news2.asus.com.tw
WWW: www.asus.com.tw
FTP: ftp.asus.com.tw/pub/ASUS
ASUS COMPUTER INTERNATIONAL (America)
Marketing Address: 6737 Mowry Avenue, Mowry Business
Center, Building 2, Newark, California
94560, USA
Fax: [phone]
Email: [email protected]
Tech Support Fax: [phone]
BBS: [phone]
Email: [email protected]
WWW: www.asus.com
FTP: ftp.asus.com.tw/pub/ASUS
ASUS COMPUTER GmbH (Europe)
Marketing Address: Harkort Str. 25, 40880 Ratingen, BRD,
Germany
Telephone: [phone]
Fax: [phone]
Email: [email protected]
Tech Support Hotline: [phone]
BBS:49-2102-448690
Email: [email protected]
WWW: www.asuscom.de
FTP: ftp.asuscom.de/pub/ASUSCOM

FCC & DOC Compliance
Federal Communications Commission Statement
This device complies with FCC Rules Part 15. Operation is subject to the
following two conditions:
•This device may not cause harmful interference, and
•This device must accept any interference received, including
interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference in
a residential installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance with
manufacturer's instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
•Re-orient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment to an outlet on a circuit different from that to
which the receiver is connected.
•Consult the dealer or an experienced radio/TV technician for help.
WARNING! The use of shielded cables for connection of the monitor to the
graphics card is required to assure compliance with FCC regulations.
Changes or modifications to this unit not expressly approved by the party
responsible for compliance could void the user's authority to operate this
equipment.
Canadian Department of Communications Statement
This digital apparatus does not exceed the Class B limits for radio noise
emissions from digital apparatus set out in the Radio Interference
Regulations of the Canadian Department of Communications.

Table of Contents
Chapter 1 Introduction ............................................................1-1
Chapter 2 Features...................................................................2-1
Chapter 3 Functional Description...........................................3-1
3.1 RAID Management...........................................................3-1
3.2 Drive Failure Management ............................................... 3-5
3.3 Disk Array Parameters.................................................... 3-11
3.4 Cache Parameters.......................................................... 3-13
3.5 Drive-Side SCSI Parameters.......................................... 3-15
3.6 Dynamic Logical Drive Expansion .................................. 3-20
Chapter 4 Hardware Installation..............................................4-1
4.1 The Main Board................................................................4-1
4.2 Installing DRAM SIMM.....................................................4-2
4.3 Basic Operational Set-Up ................................................. 4-3
4.4 Configuration Examples and Termination Settings............4-4
Chapter 5 Quick Setup.............................................................5-1
5.1 Using the BIOS RAID Manager......................................... 5-1
Chapter 6 Configuring RAID....................................................6-1
6.1 Starting to Build a RAID System Drive.............................. 6-1
6.2 How Does the RAID Controller Work? .............................. 6-4
Chapter 7 BIOS Configuration Utility......................................7-1
7.1 Configuration.................................................................... 7-1
7.2 Color/Monochrome........................................................... 7-5
Chapter 8 Text RAID Manager User Interface......................... 8-1
8.1 The Main Menu.................................................................8-1
8.2 Viewing and Editing Logical Drives................................. 8-10
8.3 Viewing and Editing SCSI ID Map................................... 8-27
8.4 Viewing and Editing SCSI Drives.................................... 8-32
8.5 Viewing and Editing SCSI Channels ............................... 8-37
8.6 Viewing and Editing Configuration Parameters............... 8-62
8.7 System Functions........................................................... 8-79
8.8 Viewing System Information........................................... 8-86
Chapter 9 Remote Administration...........................................9-1
9.1 GUI RAID Manager Using SNMP Service.........................9-1
Appendix A Driver Installation................................................A-1
1 MS-DOS®ASPI Drivers Installation.........................................A-1
2 NetWare®Driver Installation ...................................................A-3
2.1 Installing NetWare 3.1x ....................................................A-3
2.2 Installing NetWare 4.0x/4.1/4.11.......................................A-5
3 Windows NT®3.1/3.51 Driver Installation..............................A-11
3.1 Installing Driver During Windows NT 3.1/3.51 InstallationA-12
3.2 Installing Driver in Existing Windows NT3.1/3.51 SystemA-13
3.3 Updating Windows NT 3.1/3.51 Device Driver................A-14
3.4 Installing the Driver During Windows NT 4.0 InstallationA-15

3.5 Installing the Driver During Installation of Windows NT 4.0
(for DEC Alpha)........................................................................A-17
3.6 Installing the Driver in Existing Windows NT 4.0
(for DEC Alpha)........................................................................A-18
4 Windows®95/98 Driver Installation .......................................A-19
4.1 Installing Windows 95/98 and the Driver.........................A-19
4.2 Updating Device Driver for Windows 95/98 ....................A-21
5 OS/2®Driver Installation.......................................................A-21
5.1 Installing Driver During OS/2 2.x or 3.0 Installation.........A-22
5.2 Installing Driver in an Existing OS/2 2.x/3.0 System.......A-22
5.3 Updating ASUS PCI-DA2200 OS/2 Device Driver ..........A-23
5.4 ASUS PCI-DA2200 OS/2 Driver Command-Line OptionsA-23
6 Driver Installation for SCO OpenServer and UnixWare.........A-25
6.1 Installing the SCO OpenServer Driver............................A-25
7 Drivers and Utilities for Linux................................................A-27
7.1 Making Floppy Diskettes for Red Hat 5.1 Installation......A-27
7.2 Making Floppy Diskettes for SlackWare 3.2 Installation..A-28
7.3 Installing Red Hat Linux..................................................A-28
7.4 Installing SlackWare Linux.............................................A-30
7.5 Running the ASUS Text RAID Manager for Linux...........A-31
8 Drivers and Utilities for Sun Solaris™....................................A-32
8.1 Solaris 2.5.x and 2.6 (x86 platform)................................A-32
8.2 Installing the x86 Platform Driver and ASUS Text RAID
Manager...................................................................................A-33
8.3 Drivers and Utilities for Solaris 2.5.x and 2.6 (SPARC
platform) ..................................................................................A-34
8.4 Installing the SPARC platform Driver and ASUS Text RAID
Manager...................................................................................A-35
8.5 Configuring RAID in Solaris with ASUS Text RAID ManagerA-37
Appendix B SCSI Cable Specifications..................................B-1
Appendix C Upgrading BIOS, Firmware, and Boot Record..C-1
Appendix D Sync. Clock Period & Sync. Clock Frequency...D-1
Appendix E Troubleshooting Guide.......................................E-1
Appendix F Specifications......................................................F-1
Appendix G Record the Settings............................................G-1
View and Edit Logical Drives......................................................G-1
View and Edit Host LUNs ...........................................................G-2
View and Edit SCSI Drives.........................................................G-2
View and Edit SCSI Channels ....................................................G-3
View and Edit Configuration Parameters ....................................G-3
Index

1-1
ASUS PCI-DA2200 User’s Manual
Chapter 1Introduction
The ASUS PCI-DA2200 is a PCI-to-SCSI RAID controller specifically
designed to provide RAID 0, 1, 3 or 5 capability to any host system
equipped with a Little Endian PCI Local Bus interface. All the RAID
functions of ASUS PCI-DA2200 are performed by an AMD 5x86 CPU
coupled with high-speed DRAMs and firmware in flash memory. In
effect, it endows the host system with the high-performance and
fault-tolerant disk storage operation of RAID technology. It is also an
ideal solution for weaving several hard disks into one contiguous
volume.
The controller has comprehensive drive failure management that
allows automatic reassignment of reserved blocks when a bad sector
is encountered during a write. Hot-swapping is supported through
automatic disconnection of a failed drive and detection of a reserved
drive followed with background rebuilding of data. The controller
also supports spare drive operation. Remarkably, all of these failure
recovery procedures are transparent to the host system.
The ASUS PCI-DA2200 has been designed with ease of integration
and maintenance in mind. The major features are described in the
next chapter. The controller already includes all the major
operational requirements for a RAID subsystem. The overall features
of a fully-built RAID subsystem will, however, depend on the actual
components used and the creativity of the integrator.

1-2ASUS PCI-DA2200 User’s Manual
This page is left intentionally blank.

2-1
ASUS PCI-DA2200 User’s Manual
Chapter 2Features
üFive operating modes:
Non-RAID Disk Spanning
RAID-0 Disk Striping
RAID-1 Disk Mirroring and Striping (RAID 0+1)
RAID-3 Disk Striping with Dedicated Parity
RAID-5 Multiple Block Striping with Interspersed
Parity
üComprehensive failure management including:
§Automatic bad sector reassignment
§Hot-swapping
§Spare drive operation (Supports both Global Spare and Local
Spare)
§Background rebuilding (Rebuild priority selectable)
§Verify-after-Write supported on normal writes, rebuild
writes and/or RAID initialization writes
üPCI Rev. 2.1 compliant
üPCI form factor: 9.21”(L) x 4.2”(W)
üSupports up to 15 SCSI drives per channel
üUp to 8 logical drives, each with independent RAID modes
üUp to 8 partitions per logical drive
üNumber of drives for each logical drive has no limitation
üDynamic mapping of LUNs to logical drives
üConcurrent/Background logical drive initialization
üPerformance optimization for Sequential or Random I/O
üAllows multiple drive failure and concurrent multiple drive
rebuild of a RAID (0+1) logical drive
üConfiguration of individual SCSI target parameters
üPrior to first disk access, it allows adjustment of delay time
during controller initialization to enhance compatibility with
slow-initial drives
üAll channels are Ultra2-Wide-SCSI (downward compatible to
SCSI-1)
üCompatible and will automatically match any SCSI hard disks
with SCSI-1, SCSI-2 or (Ultra)-Wide-SCSI (1 or 2) specification

2-2ASUS PCI-DA2200 User’s Manual
üFull Ultra2 Wide SCSI-2 implementation including Tagged
Command Queuing and Multi-Threaded I/O
üUses AMD 5x86-133 CPU with all executable firmware
downloaded into high-speed DRAM
üEDO DRAM supported for enhanced performance
üUp to 128 Mbytes of intelligent Read-Ahead/Write-Back cache
üFirmware resides in easy-to-update Flash Memory
üGUI RAID Manager and Text RAID Manager interfaces for RAID
management

3-1
ASUS PCI-DA2200 User’s Manual
Chapter 3Functional Description
The advantages of RAID are: Availability, Capacity and Performance.
Choosing the right RAID level and drive failure management can
increase Availability, subsequently increasing Performance and
Capacity. The ASUS PCI-DA2200 RAID controller provides complete
RAID functionality and enhanced drive failure management.
3.1 RAID Management
RAID stands for Redundant Array of Independent Drives. The
advantages of using a RAID storage subsystem are:
•Provides disk spanning by weaving all connected drives into one
single volume.
•Increases disk access speed by breaking data into several blocks
when reading/writing to several drives in parallel. With RAID,
storage speed increases as more drives are added.
•Provides fault-tolerance by mirroring or parity operation.
What are the RAID levels?
RAID
Level Description Minimum Drives Data Availability Performance Sequential Performance Random
NRAID Non-RAID 1Drive Drive
RAID 0 Disk Striping N==NRAID R: Highest
W: Highest R: High W: Highest
RAID 1
(0+1) Mirroring Plus Striping (if N>1) N+1 >>NRAID ==RAID 5 R: High W: Medium R: Medium W: Low
RAID 3 Striping with Parity
on dedicated disk N+1 >>NRAID ==RAID 5 R: High W: Medium R: Medium W: Low
RAID 5 Striping with
interspersed parity N+1 >>NRAID ==RAID 5 R: High W: Medium R: High W: Low

3-2ASUS PCI-DA2200 User’s Manual
NRAID
Disk Spanning
NRAID stands for Non-RAID. The capacity of all the drives are
combined to become one logical drive (no block striping). In other
words, the capacity of the logical drive is the total capacity of the
physical drives. NRAID does not provide data redundancy.
JBOD
Single-drive Control
JBOD stands for Just a Bunch of Drives. The controller treats each
drive as a stand-alone disk, therefore each drive is an independent
logical drive. JBOD does not provide data redundancy.
+
+
+
=
2GBHardDrive
3GBHardDrive
1GBHardDrive
2GBHardDrive
Logical
Drive 2 + 3 + 1 + 2 = 8 GB Logical Drive
=2 GB Hard Drive
3 GB Hard Drive
1 GB Hard Drive
2 GB Hard Drive
2 GB
Logical Drive
=
=
=
3 GB
1 GB
2 GB
Logical Drive
Logical Drive
Logical Drive
NRAID
Minimum
Disks required 1
Capacity N
Redundancy No
JBOD
Minimum
Disks required 1
Capacity 1
Redundancy No

3-3
ASUS PCI-DA2200 User’s Manual
RAID 0
Disk Striping
RAID 0 provides the highest performance but no redundancy. Data
in the logical drive is striped (distributed) across several physical
drives.
RAID 1
Disk Mirroring
RAID 1 mirrors the
data stored in one hard drive to another. RAID 1 can only be
performed with two hard drives. If there are more than two hard
drives, RAID (0+1) will be performed automatically.
Block 1
Block 2
Block 3
Block 4
Block 5
Block 6
Block 7
Block 8
.
.
Block 1
Block 3
Block 5
Block 7
Block 2
Block 4
Block 6
Block 8
Striping
Logical Drive Physical Disks
.
..
.
Block 1
Block 2
Block 3
Block 4
Block 5
Block 6
Block 7
Block 8
.
.
Block 1
Block 2
Block 3
Block 4
Mirror 1
Mirror 2
Mirror 3
Mirror 4
Mirroring
Logical Drive Physical Disks
.
..
.
RAID 1
Disks required 2
Capacity N/2
Redundancy Yes
RAID 0
Minimum
Disks required 2
Capacity N
Redundancy No

3-4ASUS PCI-DA2200 User’s Manual
RAID (0+1)
Disk Striping with
Mirroring
RAID (0+1) combines RAID 0 and RAID 1 - Mirroring and Striping.
RAID (0+1) allows multiple drive failure because of the full
redundancy of the hard drives. If there are more than two hard
drives assigned to perform RAID 1, RAID (0+1) will be performed
automatically.
IMPORTANT:
“RAID (0+1)” will not appear in the list of RAID levels supported by the
controller. If you wish to perform RAID 1, the controller will determine
whether to perform RAID 1 or RAID (0+1). This will depend on the drive
number that has been selected for the logical drive.
RAID 3
Disk Striping with
Dedicated Parity Disk
RAID 3 performs Block Striping with Dedicated Parity. One drive
member is dedicated to storing the parity data. When a drive
member fails, the controller can recover/regenerate the lost data of
the failed drive from the dedicated parity drive.
Block 1
Block 2
Block 3
Block 4
Block 5
Block 6
Block 7
Block 8
.
.
Block 1
Block 3
Block 5
Block 7
Block 2
Block 4
Block 6
Block 8
Striping
Logical Drive
Physical Disks
.
..
.
Mirror 1
Mirror 3
Mirror 5
Mirror 7
Mirror 2
Mirror 4
Mirror 6
Mirror 8
.
..
.
Striping
Mirror
Block 1
Block 2
Block 3
Block 4
Block 5
Block 6
Block 7
Block 8
.
.
Logical Drive Physical Disks
Block 1
Block 3
Block 5
Block 7
Block 2
Block 4
Block 6
Block 8
Striping Parity (1,2)
Parity (3,4)
Parity (5,6)
Parity (7,8)
Dedicated
Parity
.
.. .. .
RAID (0+1)
Minimum
Disks required 4
Capacity N/2
Redundancy Yes
RAID 3
Minimum
Disks required 3
Capacity N-1
Redundancy Yes

3-5
ASUS PCI-DA2200 User’s Manual
RAID 5
Striping with
Interspersed Parity
RAID 5 is similar to RAID 3 but the parity data is not stored in one
dedicated hard drive. Parity information is interspersed across the
drive array. In the event of a failure, the controller can
recover/regenerate the lost data of the failed drive from the other
surviving drives.
3.2 Drive Failure Management
3.2.1 Global and Local Spare Drive
Local Spare Drive is a standby drive
assigned to serve one specified logical
drive. When a member drive of this
specified logical drive fails, the Local
Spare Drive becomes a member drive and
automatically starts to rebuild.
Global Spare Drive does not only serve one specified logical drive.
When a member drive from any of the logical drive fails, the Global
Block 1
Block 2
Block 3
Block 4
Block 5
Block 6
Block 7
Block 8
.
.
Logical Drive Physical Disks
Block 1
Parity (3,4)
Block 6
Block 7
Block 2
Block 3
Parity (5,6)
Block 8
Parity (1,2)
Block 4
Block 5
Parity (7,8)
.
.. .. .
Striping + non-dedicated Parity
Logical Drive
Local Spare Drive
1 2
3
LS
Assigns one Local Spare
Drive to a logical drive
Logical Drive
1 2
3
X
LS
Local
Spare
Drive
When one member
drive fails, the Local
Spare Drive joins the
logical drive and
automatically starts
to rebuild.
RAID 5
Minimum
Disks required 3
Capacity N-1
Redundancy Yes

3-6ASUS PCI-DA2200 User’s Manual
Spare Drive will join that logical drive and automatically starts to
rebuild.
The ASUS PCI-DA2200 RAID controller provides both Local Spare
Drive and Global Spare Drive functions. On certain occasions,
applying these two functions together will better fit various needs.
Take note though that the Local Spare Drive always has higher
priority than the Global Spare Drive.
In the example shown on the next page, the member drives in Logical
Drive 0 are 9 GB drives, and the members in Logical Drives 1 and 2
are all 4 GB drives. It is not possible for the 4 GB Global Spare Drive
to join Logical Drive 0 because of its insufficient capacity. However
Logical Drive 0
Global Spare Drive
1 2
3
GS
Logical Drive 1
1 2
Logical Drive 2
1 2
34
Global Spare Drive
GS
Logical Drive 0
1 2
3GS
Logical Drive 1
1 2
Logical Drive 2
1 2
34
Global Spare Drive
GS
XGlobal
Spare
Drive
Global Spare Drives serve
any logical drives.
When a member drive from any
logical drive fails, the Global Spare
Drive joins that logical drive and
automatically starts to rebuild.

3-7
ASUS PCI-DA2200 User’s Manual
using a 9GB drive as the Global Spare drive for a failed drive that
comes from Logical Drive 1 or 2 will bring huge amount of excess
capacity since these logical drives require 4 GB only. In the settings
below, the 9 GB Local Spare Drive will aid Logical Drive 0 once a
drive in this logical drive failed. If the failed drive is in Logical Drive
1 or 2, the 4 GB Global Spare drive will immediately give aid to the
failed drive.
3.2.2 Identifying Drives
Assuming there is a failed drive in the RAID 5 logical drive, make it a
point to replace the failed drive with a new drive to keep the logical
drive working.
When trying to remove a failed drive and you mistakenly removed
the wrong drive, you will no longer be able to read/write the logical
drive because the two drives may have already failed.
To prevent this from happening, the controller provides an easy way
of identifying for the failed drive. That is, the read/write LED of the
failed hard drive will light. This LED will prevent you from
removing the wrong drive, and is also helpful when locating for a
drive.
Logical Drive 0
Local Spare Drive
1 2
3
LS
Logical Drive 1
1 2
Logical Drive 2
1 2
34
Global Spare Drive
GS(9GB)
(9GB)
(9GB)(9GB)
(4GB)
(4GB) (4GB) (4GB) (4GB)
(4GB) (4GB)
Local Spare Drive always
has higher priority than
Global Spare Drive.

3-8ASUS PCI-DA2200 User’s Manual
Flash Selected SCSI Drive
The Read/Write LED of the drive you selected
will light steadily for about one minute.
Flash All SCSI Drives
The Read/Write LED of all connected drives will
light for about one minute. If the LED of the
defective drive did not light on the “Flash
Selected SCSI Drive” function, use “Flash All
SCSI Drives”. The “Flash All SCSI Drives”
function will light LEDs of all the drives except
the defective one.
3.2.3 Automatic Rebuild and Manual
R/W LED
R/W LED
R/W LED
R/W LED
LED Steadily ON
LED Steadily ON
LED Steadily ON
LED Steadily ON
LED Steadily ON
LED Steadily ON

3-9
ASUS PCI-DA2200 User’s Manual
Rebuild
Automatic Rebuild
One member drive
fails in logical drive
Any
local spare drive
assigned to logical
drive?
Any
global spare drive
assigned to logical
drive?
“Periodic
Auto-Detect Failure
Drive Swap Check Time”
enabled?
Has the
failed drive been
swapped?
Waiting for spare
drive to be added
or manual rebuild
Rebuild using the
swapped drive
Rebuild using the
local spare drive
Rebuild using the
global spare drive
Keep detecting if drive
has been swapped or
spare drive has been
added
No
Yes
No
No
Yes
No
Yes
Yes
When a member drive in the logical drive failed, the controller will
first check whether there is a Local Spare Drive assigned to this
logical drive. If yes, it will automatically start to rebuild.
If there is no Local Spare Drive available, the controller will search
for a Global Spare Drive. If there is a Global Spare Drive, it will
automatically rebuild the logical drive.
If neither a Local Spare Drive nor a Global Spare Drive is available,
and the “Periodic Auto-Detect Failure Drive Swap Check Time” is
“Disabled,” the controller will not try to rebuild unless the user
applies a forced manual rebuild.
When the “Periodic Auto-Detect Failure Drive Swap Check Time” is
enabled (i.e., a check time interval has been selected), the controller
will detect whether or not the failed drive has been swapped (by
checking the failed drive’s channel/ID). Once the failed drive has
been swapped, the rebuild will begin immediately.

3-10 ASUS PCI-DA2200 User’s Manual
If the failed drive is not swapped but a local spare drive is added to
the logical drive, rebuilding will begin with the spare drive.
Manual Rebuild
When a user applies forced-manual rebuild, the controller will first
check whether there is any Local Spare Drive assigned to this logical
drive. If yes, it will automatically start to rebuild.
If there is no Local Spare Drive available, the controller will search
for a Global Spare Drive. If there is a Global Spare Drive, it will
automatically rebuild the logical drive.
User applies
forced-manual
rebuild
Any
Local Spare Drive
assigned to this
logical drive?
Yes
Yes Rebuild using the
Local Spare Drive
Any
Global Spare Drive
assigned to this
logical drive?
Rebuild using the
Global Spare Drive
No
No
Wait for
manual rebuild
Yes
Has the failed drive
been replaced?
Rebuild using the
replaced drive
No
If neither a Local Spare Drive nor a Global Spare Drive is available,
the controller will detect the SCSI channel and ID of the failed drive.
Once the failed drive has been replaced by a new drive/used drive, it
starts to rebuild using the replaced drive. If there is no available
drive for rebuilding, the controller will not try to rebuild again until
the user applies another forced-manual rebuild.