SOLVED: Which I/O Scheduler is in Use?

[Man-wai Chang]

>> > /sys/block/fd0/queue/scheduler: noop anticipatory [deadline] cfq
> Yes. Pass the kernel the command line argument
> 
> elevator=<scheduler>
> 
> where <scheduler> is one of noop, anticipatory, deadline, or cfq.
>

That means one couldn't change it after the boot?

In Ubuntu, all 4 block devices use anticipatory scheduling.

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