Maximum Chunk Sizes For A Raidset - Compaq StorageWorks HSZ80 Configuration And Cli Reference Manual

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.
3 members
4 members
5 members
6 members
7 members
8 members
9 members
10 members
11 members
12 members
13 members
14 members
Table 3–4 Maximum Chunk Sizes for a RAIDset
RAIDset Size Maximum Chunk Size
1024 blocks
682 blocks
512 blocks
409 blocks
341 blocks
292 blocks
256 blocks
227 blocks
204 blocks
186 blocks
170 blocks
157 blocks