HP Surestore Disk Array 12h - And FC60 Service Manual page 195

When setting stripe segment size, consider the following:
•
Stripe segment size can affect disk array performance. The smaller the stripe segment
size, the more efficient the distribution of data read or written across the stripes in the
volume. However, if the stripe segment is too small for a single I/O operation, the
operation requires access to two disk. Called a stripe crossing, this action reduces
performance. The optimum stripe segment size is the smallest size that will rarely force
I/Os to a second disk.
•
The stripe segment size can be set to any multiple of the cache page size setting. For
example, if the cache page size is set to 4
bytes, 8 bytes, 16
K K
bytes, the stripe segment size can be set to 4
K
bytes, 32 bytes, etc.
K K
Managing Disk Array Capacity
195