23 Dec
2009
23 Dec
'09
3:37 p.m.
On Dec 22, 2009, at 10:14 PM, John R Pierce pierce@hogranch.com wrote:
Ross Walker wrote:
Also, for random IO the opposite is true, the rotational latency is significantly smaller on the inner tracks than the outer tracks, so random OPs perform better there.
um, most all hard disks are CAV, so the rotational latency measured in milliseconds is constant throughout the disk. usually 50% of a turn is the assumed mean rotational latency
I think you might be confusing CAV with CLV of optical drives.
http://en.m.wikipedia.org/wiki/Constant_Angular_Velocity
-Ross