Re: questions about io scheduler

[Mike Fedyk]

Nick Piggin wrote:
> Kyle Wong wrote:
> > 2. Does io scheduler works with md RAID? Correct me if I'm wrong,
> > io-schedular <-->  md driver <--> harddisks.
>
> It goes md driver -> io schedulers -> hard disks.

There is an IO scheduler per disk.

So MD submits the data to each disk through the IO scheduler.

This allows you to have the heads on each disk in the array at different 
locations, and helps keep response times lower for seeky loads.
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