HP P4000 HP Smart Array SAS controllers for Integrity servers support guide - Page 57

Changing the rebuild priority of a logical drive

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# saconfig /dev/ciss7 -D 0 -s all All spare drives are deleted from logical drive 0 Changing the rebuild priority of a logical drive To set the rebuild priority of logical drives, use the saconfig /dev/cissX -r command. For example: # saconfig /dev/ciss5 -r high In this example, the rebuild priority is set to high for the logical drives under controller ciss5. Specifying the percentage of cache used for read caching To specify a percentage of cache to be used exclusively for read caching, use the saconfig /dev/cissX -C command. For example: # saconfig /dev/ciss5 -C 100 Read cache percentage changed to 100% You can set the to 0, 25, 50, 75, or 100 percent of the cache. Auto-fail missing disks at boot To enable or disable auto-fail of missing disks at boot, use the saconfig /dev/cissX -F on|off command. For example: # saconfig /dev/ciss5 -F on Auto-fail missing disks enabled Creating multiple logical drives in an array To create multiple logical drives in an array, use the command: saconfig /dev/cissX -R -p [-p ...]-c For example: # saconfig /dev/ciss5 -R ADG -p 1I:1:9 -p 1I:1:10 -p 1I:1:11 -p 1I:1:12 -c 10 Logical drive 0 created Rebuild priority is set to High NOTE: If you do not specify a capacity using -c , the maximum capacity or the remaining capacity in the array is applied to the logical drive. Performing RAID level migration To migrate an existing logical drive to a different RAID level, use the command: saconfig /dev/cissX -M -R [-S ] For example: # saconfig /dev/ciss5 -M 0 -R 5 Logical drive 0 migrated from ADG to 5 Migrating a logical drive to a different RAID level does not change its capacity. The saconfig configuration CLI 57

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#
saconfig /dev/ciss7 -D 0 -s all
All spare drives are deleted from logical drive 0
Changing the rebuild priority of a logical drive
To set the rebuild priority of logical drives, use the
saconfig /dev/ciss
X
-r
<low |
medium | high>
command.
For example:
# saconfig /dev/ciss5 -r high
In this example, the rebuild priority is set to high for the logical drives under controller
ciss5
.
Specifying the percentage of cache used for read caching
To specify a percentage of cache to be used exclusively for read caching, use the
saconfig
/dev/ciss
X
-C
<read_caching_percentage>
command.
For example:
#
saconfig /dev/ciss5 -C 100
Read cache percentage changed to 100%
You can set the
<read_caching_percentage>
to 0, 25, 50, 75, or 100 percent of the cache.
Auto-fail missing disks at boot
To enable or disable auto-fail of missing disks at boot, use the
saconfig /dev/ciss
X
-F
on|off
command.
For example:
#
saconfig /dev/ciss5 -F on
Auto-fail missing disks enabled
Creating multiple logical drives in an array
To create multiple logical drives in an array, use the command:
saconfig /dev/cissX -R
<RAID level>
-p
<physical drive id>
[-p
<physical
drive id>
...]-c
<capacity in GB>
For example:
#
saconfig /dev/ciss5
–
R ADG
–
p 1I:1:9
–
p 1I:1:10
–
p 1I:1:11
–
p 1I:1:12
–
c 10
Logical drive 0 created
Rebuild priority is set to High
NOTE:
If you do not specify a capacity using -c
<capacity in GB>
, the maximum capacity
or the remaining capacity in the array is applied to the logical drive.
Performing RAID level migration
To migrate an existing logical drive to a different RAID level, use the command:
saconfig /dev/ciss
X
-M
<Logical drive #>
-R
<RAID level>
[-S
<Stripe
size (KB)>
]
For example:
#
saconfig /dev/ciss5 -M 0 -R 5
Logical drive 0 migrated from ADG to 5
Migrating a logical drive to a different RAID level does not change its capacity.
The saconfig configuration CLI
57