From mboxrd@z Thu Jan 1 00:00:00 1970 From: Goswin von Brederlow Subject: Re: linux disk access when idle Date: Sat, 22 Aug 2009 08:33:37 +0200 Message-ID: <874os0l5mm.fsf@frosties.localdomain> References: <20090820163522.GA29215@sewage> <4A8D99D9.2090806@sauce.co.nz> <20090821165935.GA18915@sewage> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: In-Reply-To: <20090821165935.GA18915@sewage> (Matt Garman's message of "Fri, 21 Aug 2009 11:59:35 -0500") Sender: linux-raid-owner@vger.kernel.org To: Matt Garman Cc: linux-raid List-Id: linux-raid.ids Matt Garman writes: > On Fri, Aug 21, 2009 at 06:45:45AM +1200, Richard Scobie wrote: >> Matt Garman wrote: >>> So what I'm trying to figure out is, what is causing the disk >>> access? It could be any one of: >>> >>> - Kernel >>> - RAID subsystem (i.e. md) >>> - XFS filesystem >>> - NFS >>> - Samba >>> - ??? >> >> Are you running smartd? It polls the drives every 30minutes. > > I was running smartd, until I received your post :) > > Unfortunately, this does not help keep the heads parked any longer. > > Nonetheless, thank you for the hint. > > Matt Smartd has an option not to wake up disks. If you have smartd scann less often than the suspend time of the disk then idle disk can spinn down and stay that way. MfG Goswin