From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roy Sigurd Karlsbakk Subject: Re: getting I/O errors in super_written()...any ideas what would cause this? Date: Wed, 28 Nov 2012 19:51:48 +0100 (CET) Message-ID: <8134827.27.1354128708501.JavaMail.root@zimbra> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: =?utf-8?Q?Mathias_Bur=C3=A9n?= Cc: Neil Brown , Linux-RAID , Jens Axboe , Chris Friesen List-Id: linux-raid.ids > > I'm running 2.6.27 with LVM over software RAID 1 over a pair of SAS > > disks. > > > > Recently we started seeing messages of the following pattern: > > > > Nov 28 08:57:10 kernel: end_request: I/O error, dev sda, sector > > 1758169523 > > Nov 28 08:57:10 kernel: md: super_written gets error=3D-5, uptodate= =3D0 > > Nov 28 08:57:10 kernel: raid1: Disk failure on sda2, disabling > > device. > > Nov 28 08:57:10 kernel: raid1: Operation continuing on 1 devices. > > > > We're working through our changes to figure out what might have > > triggered > > it, but it seems likely the root cause lies in the core code. > > > > We're assuming it's a software issue since it's reproducible on > > multiple > > new-ish systems, although so far we've only tried it on systems wit= h > > one > > particular configuration--we're planning on trying it with differen= t > > disks > > just to be sure. > > > > For what it's worth, we've seen the problems with disk write cache > > enabled > > and disabled. > > > > Anyone have any ideas, or pointers as to what I should look at? > > Hi, >=20 > It would be interesting to see what SMART says about the above, sinde > the error is regarding sda first, then md follows. > Agreed - run smartctl -H /dev/sda or smartctl -a /dev/sda if -H succeed= s =20 Vennlige hilsener / Best regards roy -- Roy Sigurd Karlsbakk (+47) 98013356 roy@karlsbakk.net http://blogg.karlsbakk.net/ GPG Public key: http://karlsbakk.net/roysigurdkarlsbakk.pubkey.txt -- I all pedagogikk er det essensielt at pensum presenteres intelligibelt.= Det er et element=C3=A6rt imperativ for alle pedagoger =C3=A5 unng=C3=A5= eksessiv anvendelse av idiomer med xenotyp etymologi. I de fleste tilf= eller eksisterer adekvate og relevante synonymer p=C3=A5 norsk. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html