HP ProLiant DL288 Configuring Arrays on HP Smart Array Controllers Reference G - Page 85

Size, SSPAdaptersWithAccess, StripeSize, In Con action mode

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Logical drive performance is likely to decrease with MaxBoot enabled. Size Enter the capacity that you want the logical drive to have, in megabytes. The default size setting for new logical drives is MAX. In this case, ACU creates a logical drive of the maximum possible size from the physical drives that you assigned to the array. In Reconfigure mode, the default setting is the existing size of the logical drive. If you enter a larger value, ACU extends the logical drive to the new size if there is unused drive capacity on the same array, as long as the operating system supports logical drive extension. You cannot reduce the size of the logical drive. CAUTION: Back up all data before extending a logical drive. SSPAdaptersWithAccess Enter values here to identify the SSP adapters that you want to have access to a logical drive. The values are processed only if either SSPState or LogicalDriveSSPState is set to Enable. Otherwise, the values are ignored. NOTE: Be sure that every HBA in the system has access to the logical drives for which multipath will be used. StripeSize You can enter a numerical value for this option to specify the size of the data stripes (in kilobytes), or you can leave this option blank and allow ACU to use a default value. The valid stripe size values depend on the RAID level. • For RAID 0, RAID 1, or RAID 1+0 arrays, you can enter any of the stripe size values listed in the sample script. • For RAID 5 arrays, the maximum stripe size in most cases is 256 KB, but old controller models are often limited to 64 KB. • For RAID 6 arrays, the maximum stripe size is either 64 KB or 256 KB, depending on the controller. The default stripe size value depends on the action mode. • In Configure action mode, the default value is determined by the RAID level that you specified earlier in the script. (In some cases, it also depends on the ACU version, the controller model, and the controller firmware version). o For RAID 0, RAID 1, or RAID 1+0, the default value is 128 KB. o For RAID 5, the default value is usually 64 KB, but on some controller models it is 16 KB or 128 KB. o For RAID 6, the default value is usually 16 KB, but on some controller models it is 64 KB or 128 KB. • In Reconfigure action mode, the default value for this option is the stripe size that is already configured for the logical drive. If you enter a value that is different from the existing stripe size, ACU attempts to migrate the logical drive to the stripe size that you specify. (If you intend to migrate the logical drive, back up all data before starting the migration procedure.) HP Array Configuration Utility 85

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HP Array Configuration Utility
85
Logical drive performance is likely to decrease with MaxBoot enabled.
Size
Enter the capacity that you want the logical drive to have, in megabytes. The default size setting for new
logical drives is MAX. In this case, ACU creates a logical drive of the maximum possible size from the
physical drives that you assigned to the array.
In Reconfigure mode, the default setting is the existing size of the logical drive. If you enter a larger value,
ACU extends the logical drive to the new size if there is unused drive capacity on the same array, as long
as the operating system supports logical drive extension. You cannot reduce the size of the logical drive.
CAUTION:
Back up all data before extending a logical drive.
SSPAdaptersWithAccess
Enter values here to identify the SSP adapters that you want to have access to a logical drive. The values
are processed only if either SSPState or LogicalDriveSSPState is set to Enable. Otherwise, the values are
ignored.
NOTE:
Be sure that every HBA in the system has access to the logical drives for which multi-
path will be used.
StripeSize
You can enter a numerical value for this option to specify the size of the data stripes (in kilobytes), or you
can leave this option blank and allow ACU to use a default value.
The valid stripe size values depend on the RAID level.
•
For RAID 0, RAID 1, or RAID 1+0 arrays, you can enter any of the stripe size values listed in the
sample script.
•
For RAID 5 arrays, the maximum stripe size in most cases is 256 KB, but old controller models are
often limited to 64 KB.
•
For RAID 6 arrays, the maximum stripe size is either 64 KB or 256 KB, depending on the controller.
The default stripe size value depends on the action mode.
•
In Configure action mode, the default value is determined by the RAID level that you specified earlier
in the script. (In some cases, it also depends on the ACU version, the controller model, and the
controller firmware version).
o
For RAID 0, RAID 1, or RAID 1+0, the default value is 128 KB.
o
For RAID 5, the default value is usually 64 KB, but on some controller models it is 16 KB or 128
KB.
o
For RAID 6, the default value is usually 16 KB, but on some controller models it is 64 KB or 128
KB.
•
In Reconfigure action mode, the default value for this option is the stripe size that is already
configured for the logical drive. If you enter a value that is different from the existing stripe size,
ACU attempts to migrate the logical drive to the stripe size that you specify. (If you intend to migrate
the logical drive, back up all data before starting the migration procedure.)