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Re: xfssyncd and disk spin down

To: Petre Rodan <petre.rodan@xxxxxxxxxx>
Subject: Re: xfssyncd and disk spin down
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Mon, 27 Dec 2010 13:19:04 +1100
Cc: xfs@xxxxxxxxxxx
In-reply-to: <20101223165532.GA23813@xxxxxxxxxxxxxxxx>
References: <20101223165532.GA23813@xxxxxxxxxxxxxxxx>
User-agent: Mutt/1.5.20 (2009-06-14)
On Thu, Dec 23, 2010 at 06:55:32PM +0200, Petre Rodan wrote:
> 
> Hello,
> 
> I have a problem with a hard drive that never managed to spin
> down. this drive is a storage space, not a system disk, the only
> thing that generated writes is the nfs server that exports its
> contents. it has only one large xfs partition on it.
> 
> upon closer inspection it turns out that after the first Write
> action to that partition, an xfssyncd process continues to write
> to that partition each 36 seconds and it doesn't stop doing that,
> even if there are no more Writes from the exterior. this keeps the
> drive busy with varying consequences. more about that later.

Should be fixed in 2.6.37 by the commit:

1a387d3 xfs: dummy transactions should not dirty VFS state

Cheers,

Dave.
-- 
Dave Chinner
david@xxxxxxxxxxxxx

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