From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rick Bragg Subject: Re: fsck problems. Can't restore raid Date: Fri, 25 Dec 2009 22:12:47 -0500 Message-ID: <1261797167.10448.100.camel@vibe> References: <1261791227.10448.88.camel@vibe> <1261795651.10448.97.camel@vibe> Mime-Version: 1.0 Content-Type: multipart/signed; micalg="sha1"; protocol="application/x-pkcs7-signature"; boundary="=-q1sK26ObUfuo+4StnTNu" Return-path: In-Reply-To: <1261795651.10448.97.camel@vibe> Sender: linux-raid-owner@vger.kernel.org To: Linux RAID List-Id: linux-raid.ids --=-q1sK26ObUfuo+4StnTNu Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Fri, 2009-12-25 at 21:47 -0500, Rick Bragg wrote: > On Fri, 2009-12-25 at 20:33 -0500, Rick Bragg wrote: > > Hi, > >=20 > > I have a raid 10 array and for some reason the system went down and I > > can't get it back.=20=20 > >=20 > > during re-boot, I get the following error: > >=20 > > The superblock could not be read or does not describe a correct ext2 > > filesystem. If the device is valid and it really contains an ext2 > > filesystem (and not swap or ufs or something else), then the superblock > > is corrupt, and you might try running e2fsck with an alternate > > superblock: > > e2fsck -b 8193 > >=20 > > I have tried everything I can think of and I can't seem to do an fsck or > > repair the file system. > >=20 > > what can I do? > >=20 > > Thanks > > Rick > >=20 >=20 >=20 > More info: >=20 > My array is made up of /dev/sda, sdb, sdc, and sdd. However they are > not mounted right now. My OS is booted off of /dev/sde. I am running > ubuntu 9.04 >=20 > mdadm -Q --detail /dev/md0 > mdadm: md device /dev/md0 does not appear to be active. >=20 > Where do I take if from here? I'm not up on this as much as I should be > at all. In fact I am quite a newbe to this... Any help would be greatly > appreciated. >=20 > Thanks > Rick >=20 Here is even more info: # mdadm --assemble --scan mdadm: /dev/md0 assembled from 2 drives - not enough to start the array. # mdadm --assemble /dev/sda /dev/sdb /dev/sdc /dev/sdd mdadm: cannot open device /dev/sdb: Device or resource busy mdadm: /dev/sdb has no superblock - assembly aborted Is my array toast? What can I do? 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