[CentOS] partitioning order and IO performance

John R Pierce pierce at hogranch.com
Wed Dec 23 03:14:06 UTC 2009


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




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