Date: Fri, 14 Apr 2006 13:21:12 -0700 (PDT) From: Bigby Findrake <bigby@ephemeron.org> To: Garrett Cooper <youshi10@u.washington.edu> Cc: freebsd-questions@freebsd.org Subject: Re: Determining whether or not a SCSI disk is in use Message-ID: <20060414131931.Q81702@home.ephemeron.org> In-Reply-To: <20060414130832.Y81702@home.ephemeron.org> References: <443F5CE6.4080107@u.washington.edu> <20060414091338.GY44921@wantadilla.lemis.com> <443FF97B.6000303@u.washington.edu> <20060414130832.Y81702@home.ephemeron.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Fri, 14 Apr 2006, Bigby Findrake wrote:
I'm sorry, I'm an idiot - the script, in its current incarnation, needs to
be modified. It's doing exactly what you don't want it to do - it will
shut down the disk if there was activity. The if statement should read:
if [ $STATUS -ne 0 ]
> On Fri, 14 Apr 2006, Garrett Cooper wrote:
>
>> Yes. Recently accessed or is being accessed.
>> -Garrett
>
> Well, for a shell-script-hack, which (i) requires no new kernel and (ii)
> could be fairly portable but (iii) could conceivably miss some activity, you
> could do something like the following:
>
> #!/bin/sh
>
> DISKDEV=da0
> SHUTDOWN_COMMAND="camcontrol stop 0,1,0"
> SECONDS=60
>
> # check for activity
> # watch iostat for $SECONDS seconds for anything
>
> iostat -d $DISKDEV 1 5 | awk ' NR>2 && $2>0 { print "x" } ' |\
> grep x > /dev/null
>
> STATUS=$?
>
> if [ $STATUS -eq 0 ]
> then
>
> # there was activity,
> $SHUTDOWN_COMMAND
> fi
>
/-------------------------------------------------------------------------/
Workaholics procrastinate too... I'll sleep tommorow.
finger://bigby@ephemeron.org
http://www.ephemeron.org/~bigby/
irc://irc.ephemeron.org/#the_pub
news://news.ephemeron.org/alt.lemurs
/-------------------------------------------------------------------------/
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20060414131931.Q81702>