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5-28 Running the Array Configuration Utility
Writer: Rickard Project: Compaq Smart Array 3200 Controller Reference Guide Comments: 340862-002
File Name: F-CH05.DOC Last Saved On: 12/7/98 1:22 PM
COMPAQ CONFIDENTIAL - NEED TO KNOW REQUIRED
To select a stripe size other than the default, click the down arrow next to the
current stripe size and select from those available.
Table 5-1
Stripe Size Fault Tolerance
Fault Tolerance Level Default (KB) Valid Stripe Sizes
(KB)
Raid 0 128 8, 16, 32, 64, 128,
256
RAID 1 (RAID 0+1) 128 8, 16, 32, 64, 128,
256
RAID 4 16 8, 16, 32, 64*
RAID 5 16 8, 16, 32, 64*
*RAID 4 and 5 do not support stripe sizes larger than 64 KB per drive.
Existing Configurations
To change the stripe size on an existing configuration, select “Modify Logical
Drive.” Use “Modify/Expand Array” if physical drives will be added at the
same time stripe size is changed. See Table 5-1 for the range of supported sizes.
This can only be done if the Array Accelerator is enabled and the cache memory
is large enough to store data during the transition. See the “Distributing Data
and Data Striping” section in Appendix E for a more detailed explanation.
IMPORTANT: In some cases, when the stripe size is increased, the number
of sectors required on each physical drive will also be increased. However,
an error message will be displayed indicating the possibility of data loss. You
will be given a choice to cancel the change or to accept data loss. If you want
to preserve the data, use the Online RAID Level and Stripe-Size Migration
screen.