From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: Raid Checks Date: Sun, 3 Apr 2011 21:01:57 +1000 Message-ID: <20110403210157.2c3ac83d@notabene.brown> References: <4D983064.30808@abpni.co.uk> <4D98346F.8090502@abpni.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4D98346F.8090502@abpni.co.uk> Sender: linux-raid-owner@vger.kernel.org To: Jonathan Tripathy Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Sun, 03 Apr 2011 09:48:47 +0100 Jonathan Tripathy wrote: > > On 03/04/11 09:31, Jonathan Tripathy wrote: > > Hi Everyone, > > > > I'm running CentOS 5.5 which a stock version of mdadm. I have 2 > > physical disks in a RAID1 setup. Each disk has 4 md partitions on it. > > > > I'm experiencing the issues associated with the raid-check script > > every Sunday morning, where whatever is happening, a re-sync happens. > > Doing a little reading around Google, I see that this is probably > > caused by the mismatch_cnt being non-zero, which apparently is normal > > for RAID1 devices. According to this bug: > > > > https://bugzilla.redhat.com/show_bug.cgi?id=566828 > > > > someone has made a patch for RedHat so that mismatch_cnt isn't checked > > on RAID1 setups. However, since I don't use RedHat, and I don't really > > want to compile mdadm from scratch, is there a workaround for this? I > > don't want to just disable the raid-check script, as I think it does > > some other important checks which are useful for RAID1. > > > > Any help would be appreciated > > > > Thanks > > > Seems like I'm a little confused... > > To apply that patch, I don't need to re-compile, as it's just a script > run by cron. However, looking at the script, it may not fix my "resync" > issue which is happening every Sunday. Looks like that script just stops > the mismatch warning email from being sent. > > My main concern, is that during these resyncs, I loose redundancy, don't I? No. NeilBrown > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html