Drive failure results in loss of data
in logical drives assigned RAID level 0.
This RAID level offers substantial speed enhancement, but
allows for no data redundancy, therefore, a hard disk failure within the array results in loss of data in the
logical drive assigned RAID level 0, but only in that logical drive.
RAID Level 1
supported by the IBM RAID Controller provides an enhanced feature for disk mirroring that stripes data and
copies of the data across all the drives of the array. The first stripe is the data stripe, and the second stripe
is the mirror (copy) of the first data stripe but shifted one drive.
RAID Level 5
stripes data and parity of the data across all the drives of the array. The capacity of the logical drive when assigned
level 5 is reduced by one drive (for data parity storage).
Level 5 is generally the most desirable choice because it offers both data protection and increased throughput.
Level 5 gives a higher capacity than level 1, but level 1 offers higher performance. If after using level 5 you are dissatisfied with
the performance and can tolerate lower capacity, you can either redefine the level 5 to a level 1, or you can use a logical drive
that you have assigned level 1.
Obtaining the RAID Drive Status
The following procedure enables you to see the ID, capacity, and other information
about each of the hard disk drives.
STATUS | MEANING |
---|---|
RDY | Ready, the drive is recognized by the controller and is available for definition. |
ONL | Online, the drive is part of an array. If this drive fails, logical drives defined in the array in which this |
HSP | Hot spare, the drive will replace a similar defunct drive in real time. At this time, its status changes to ONL |
DDD | Defunct, the drive is an online or hot-spare drive that does not respond to command. (If a RDY drive is defunctional powered down, it |
OFL | Offline, the drive is a good drive that has replaced a defunct drive in a RAID level 1 or level 5 array, it is associated |
UFM | Unformatted, the drive requires a low-level format before it can be used in an array. (To perform a low-level format, select Format drive |
FMT | Format, the drive is being reformatted. |
MESSAGES associated with the IBM SCSI-2 Fast/Wide Streaming RAID-Adapter/A.
Where the Action information tells to start the IBM RAID Configuration program, insert the RAID Configuration
diskette into the primary diskette dive (usually A) and press Ctrl+Alt+Del
(Actions should be done by CUSTOMER)
Please see the LEGAL - Trademark notice.
RAID Adapter Message.
Action.
n logical drives are
n represents the number of logical drives defined
installed
Information only, no action required
Controller cannot recover
The controller does not have a complete list of all
from data
pending operations from the last usage.
inconsistencies.
Start the IBM RAID Configuration program and
synchronize all logical drives.
Controller firmware
The controller is not operational.
error. Reload firmware.
HW-error
Controller hardware
The controller is not operational
error, run RAID
HW-error
Controller diagnostics
program.
Controller is not
The controller is not operational.
responding to
HW-error
commands. No logical
drives are installed.
Data on critical logical
A power loss occurred when the logical drive was in
drive is inconsistent.
Critical state. Data is lost
Replace the defunct drive and re-create the data
Drive identified for
A hard disk drive is installed in the wrong bay.
channel n bay m found
Install the drive in the correct bay, or leave it where it
at channel x bay y .
is and reassign it to its present bay. Data in the logical
drive will be lost when you reassign it to a new bay.
To reassign the drive :
1. Start the IBM RAID Configuration program
2. Select Create/delete array from the Main Menu.
The Bay/Array selection list will appear and you
can reassign the drive.
Drive in channel n bay m
The drive in this bay does not respond to commands
does not respond.
Insert the RAID configuration Diskette and press
Ctrl+Alt+Del to restart the system. A screen will
appear to help you decide whether to declare the drive
irrecoverable. If you declare the drive irrecoverable,
start the IBM RAID Configuration program to resolve
the problem.
Installation stopped.
The controller cannot be accessed.
This message is a follow-on to a preceding message.
Follow the Action instructions for the preceding
message you received to resolve the problem.
Irrecoverable
An error exists in the configuration data stored on the
configuration error, run
RAID controller.
Configuration program.
Restore the configuration from the Disk Array
Configuration Backup diskette.
1. Start the IBM RAID Configuration Program.
2. Select Advanced functions from the Main Menu,
then select Restore config. from diskette.
3. Follow the instructions on the screen.
If the configuration stored on your Disk Array
Configuration Backup diskette is not current (or if you
do not have a backup of the configuration
information), have the system serviced.
Irrecoverable controller
The controller is not operational.
error - memory parity
HW-error
failure.
No free RAM found, no
The controller could not initialize its BIOS.
logical drives are
HW-error
installed.
No logical drives found,
No logical drives are defined
none are installed.
Start the IBM RAID Configuration program and define
a logical drive
RAID firmware
This is the version level.
version x.yy
Information only, no action is required.
Recoverable
An error exists in the configuration data stored on the
configuration error, run
controller.
Configuration program.
Insert the IBM RAID Controller Diskette and press
Ctrl+Alt+Del to restart the system. Follow the
instructions on the screen.
Recovery from data
Most likely cause was a sudden power loss during last
inconsistency is in
operation.
progress.
No action is required.
Starting drives...
The controller is starting drives in the array.
Information only, no action is required.
Unidentified drive found
The drive in this bay is not recognized by the system.
in channel n bay m
Information only, the system will assign it to that bay.
WARNING: n logical
One or more drives have failed.
drives are critical, n
Replace the defunct drives as soon as possible to
logical drives are offline.
prevent data loss.
WARNING: The
The EEPROM on the controller is reaching the end of
firmware flash EEPROM
its life and must be replaced.
is failing and must be
HW-error
replaced.
WARNING: Too many
Temporary tables in the controller are full, the
entries in the change list.
controller needs to be reset.
Reset the system to clear
Press Ctrl+Alt+Del to restart the system, then follow
it.
the instructions on the screen.
IBM RAID BIOS -
System operating in protect mode without a device
System in protect mode,
driver.
cannot continue.
Update the CONFIG.SYS file with the proper device
System halted.
drivers and restart the system.
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