HP Xw8200 LSI SCSI: Integrated RAID User's Guide (PCI plug-in and system board - Page 31

Other RAID Properties Screen Information

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(Optional) Use the arrow keys to select a hot spare disk for the IM volume. Select Yes as the value for the Hot Spare column. Press Esc and select Save changes, then exit this menu. (If you do not want to create the IM volume, select Discard changes, then exit this menu.) The IM volume is created when you save the changes, and synchronization of the mirrored disk(s) starts immediately. Other RAID Properties Screen Information - After the IM volume is created, the SCSI ID field shows which SCSI ID the operating system uses to access the IM volume. This addressing information stays the same unless the volume is reconfigured with disks that have different SCSI IDs. The IM volume addressing information will also change if the SCSI ID is changed for the physical disk whose SCSI ID is being used for the IM volume. The Size field shows the capacity of the IM volume. The volume size is slightly less than half of the combined capacity of the mirrored disks, because the utility rounds the size down to increase compatibility in case a disk of the volume must be replaced. (Even if replacement disks are of the same size class, they may differ slightly in actual capacity.) You can use the RAID Properties screen to reconfigure the IM volume after it has been created. You can change the disks in the IM volume back to standard disks by changing the values under the Array Disk column to No. When this is done, the virtual IM volume is "turned off" and the operating system can see the physical disks. You can do this if you no longer want the mirrored volume. The screen shows the properties and status of each disk in the IM volume. The Status field may show any of these values: OK, disk missing, incompatible, offline, out of sync, or disk initializing. The Predict Failure field displays SMART information. A SMART enabled disk can predict when the disk is about to fail. When Yes appears in this column (failure is predicted), the disk should be replaced. Figure 3.5 shows an example of the RAID Properties screen after a twodisk IM volume with a hot spare has been configured. Configuring IM with the BIOS-Based CU 3-9 Version 1.0 Copyright © 2003 by LSI Logic Corporation. All rights reserved.

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Configuring IM with the BIOS-Based CU
3-9
Version 1.0
Copyright © 2003 by LSI Logic Corporation. All rights reserved.
(Optional) Use the arrow keys to select a hot spare disk for the IM
volume. Select
Yes
as the value for the Hot Spare column.
Press
Esc
and select
Save changes, then exit this menu
. (If you do
not want to create the IM volume, select
Discard changes, then exit
this menu
.) The IM volume is created when you save the changes, and
synchronization of the mirrored disk(s) starts immediately.
Other RAID Properties Screen Information –
After the IM volume is created, the
SCSI ID
field shows which SCSI ID
the operating system uses to access the IM volume. This addressing
information stays the same unless the volume is reconfigured with disks
that have different SCSI IDs. The IM volume addressing information will
also change if the SCSI ID is changed for the physical disk whose SCSI
ID is being used for the IM volume.
The
Size
field shows the capacity of the IM volume. The volume size is
slightly less than half of the combined capacity of the mirrored disks,
because the utility rounds the size down to increase compatibility in case
a disk of the volume must be replaced. (Even if replacement disks are of
the same size class, they may differ slightly in actual capacity.)
You can use the RAID Properties screen to reconfigure the IM volume
after it has been created. You can change the disks in the IM volume
back to standard disks by changing the values under the Array Disk
column to
No
. When this is done, the virtual IM volume is “turned off”
and the operating system can see the physical disks. You can do this if
you no longer want the mirrored volume.
The screen shows the properties and status of each disk in the IM
volume. The
Status
field may show any of these values:
OK
,
disk
missing
,
incompatible
,
offline
,
out of sync
, or
disk initializing
.
The
Predict Failure
field displays SMART information. A SMART enabled
disk can predict when the disk is about to fail. When
Yes
appears in this
column (failure is predicted), the disk should be replaced.
Figure 3.5
shows an example of the RAID Properties screen after a two-
disk IM volume with a hot spare has been configured.