>The heart of what I've discovered is that COMSTAR picks a block size based on >the device behind it, and appears to *always* >issue IOs using that block >size, no matter what the size of the requests coming in across the wire. If >the block device is >zvol, it uses the zvol record size, which makes sense. >If the block device behind it is a physical disk, or SVM volume, it >picks 512 >bytes as the block size.
Do you mean the I/O to the COMSTAR's backend ? Or the blocksize of the device exposed to the SAN ? Sumit
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