Determining whether or not a SCSI disk is in use
Greg 'groggy' Lehey
grog at FreeBSD.org
Fri Apr 14 09:13:40 UTC 2006
On Friday, 14 April 2006 at 1:27:18 -0700, Garrett Cooper wrote:
> Hello again list,
> Just wondering if there was any way where I could possibly tie into
> the kernel or do something where I could determine whether or not a disk
> is currently 'in use'.
> Problem: I'm trying to spin down my disks periodically via a cronjob
> to save energy, reduce noise, and heat, and I don't want my disk to be
> spun down if it is currently in use. I do listen to music and watch
> videos for extended periods of time, so I'd rather not cause undue
> stress to the hard disks and cause the program I'm using on another
> machine to choke and die.
This all depends on what you mean by "in use". Do you mean "recently
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