The default block size of 8 KB has been selected as optimal for most workloads. Check with your
IBM representative to determine whether your configuration would benefit by changing the cache block size.
This functionality is not available in FAMC. Use the Format-FACache
Flash Accel PowerShell cmdlet to change the cache block size.
Information in the cache is erased for all disks on the virtual machine when you change the cache block size. The cache will take some time to be rewarmed after the block size is changed.
where size is the block size in bytes and
number is the number of chunks per block. The default block size is
8 KB. The default number of blocks per chunk is
64.
The chunk size (BlockSize × BlocksPerChunk) must be less than or equal to 1 MB. Ideally, the chunk size should be equal to the erase block size of the flash device.