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From: Thor Kristoffersen <thorkr@gmail.com>
To: xfs@oss.sgi.com
Subject: Does XFS prevent disk spindown?
Date: Mon, 31 Mar 2008 20:26:00 +0200	[thread overview]
Message-ID: <m2tzimbvif.fsf@getmail.no> (raw)

I've noticed that when I spin down XFS-mounted disks they spin up again
shortly afterwards.  I used iostat to monitor disk accesses to a mounted
partition (with noatime) in single user mode.  Apparently there is a write
access to the partition approximately every 35 seconds, even if the
partition is idle.  As far as I can understand, since there is no data that
needs to be flushed this must be done by an XFS daemon for some purpose.

Is there any setting or mount option I can use to get rid of this behavior?
I know I can freeze the filesystem, but then I have to remember to unfreeze
it every time I need to write to it, so it's not an ideal solution.


Thor

             reply	other threads:[~2008-03-31 18:27 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-31 18:26 Thor Kristoffersen [this message]
2008-04-01  0:30 ` Does XFS prevent disk spindown? David Chinner
2008-04-01  6:00   ` Eric Sandeen
2008-04-01 18:20     ` Thor Kristoffersen
2008-04-05 14:01       ` Thor Kristoffersen
2008-04-07  1:05         ` Timothy Shimmin
2008-04-07 20:33           ` Thor Kristoffersen
2008-04-07 21:58             ` David Chinner
2008-04-08  5:53               ` Thor Kristoffersen
2008-04-09  4:11                 ` [patch] " David Chinner
2008-04-09 21:32                   ` Thor Kristoffersen
2008-04-09 23:02                     ` David Chinner

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