>> Head parking while the system running is almost useless, since sooner or
>> later, someone's going to write/read something.
>
>Correct, that's why we're discussing to freeze the request queue as well.
Sounds good (esp. for laptops/notebooks, which should preferably run "on RAM"
as long as possible)
>But it suffers from the same fate - as soon as the disk receives a new
>request, it will spin up again.
In case of the SUSE bootscripts (and possibly others), some flush barriers are
engaged, then the disk is spun down and immediately after the poweroff
happens.
>So there is no gain, except that just
>parking the head without spinning down the spindle can be performed much
>faster.
What's the gain in parking the head manually if it's done anyway when the disk
spins down (for whatever reason)?
Jan Engelhardt
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