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3–54 Creating Storagesets
Increasing Sequential Write Performance
For stripesets (or striped mirrorsets), use a large chunk size relative to the I/O size to
increase the sequential write performance. A chunk size of 256 generally works well.
Chunk size does not significantly affect sequential read performance.
Maximum Chunk Size for RAIDsets
Do not exceed the chunk sizes shown in Table 3–4 for a RAIDset. The maximum
chunk size is derived by 2048/(d – 1) where d is the number of disk drives in the
RAIDset.
Table 3–4 Maximum Chunk Sizes for a RAIDset
RAIDset Size Maximum Chunk Size
3 members 1024 blocks
4 members 682 blocks
5 members 512 blocks
6 members 409 blocks
7 members 341 blocks
8 members 292 blocks
9 members 256 blocks
10 members 227 blocks
11 members 204 blocks
12 members 186 blocks
13 members 170 blocks
14 members 157 blocks