It should just pull the 4KB from the LUN. I believe all data IO size is read from LUN as the size of the IO.  glen
Hi all,    Suppose we have a [4+1 RAID-5] LUN, the strip size = 64kb(128 sectors), so the entire stripe for this RAID-5 LUN is 64*4 =256KB(doesn't account parity drive). Now one 4KB read I/O comes to this LUN, my question is: how many data will be replied? A full strip (64KB) or just 4KB successive data within one strip (don't account for disk crossing)?   thanks!
how many data would be replied in this case??