From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lars =?UTF-8?B?VMOkdWJlcg==?= Subject: Reopen: 16 HDDs too much for RAID6? Date: Fri, 28 Mar 2008 10:20:02 +0100 Message-ID: <20080328102002.a8b836b6.taeuber@bbaw.de> References: <20080306100128.8daad6bd.taeuber@bbaw.de> <20080306094559.GA29734@skl-net.de> <20080306115559.63ac361d.taeuber@bbaw.de> <20080306161621.GD32242@skl-net.de> <20080307084146.GA9653@percy.comedia.it> <20080307114555.6ce17158.taeuber@bbaw.de> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20080307114555.6ce17158.taeuber@bbaw.de> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hallo! Lars T=C3=A4uber schrieb: > I zeroed out all physical devices completely: > # for DEV in /dev/sd[c-r]; do dd if=3D/dev/zero of=3D$DEV; done >=20 > Now the problem is gone. I don't know what really caused the problem. > Many thanks for your suggestions. The problem has occured again. I'm not sure what the cause was, but the duplicated superblock is there= again. But the raid fell apart before. So I suspect this occurs only a= fter the array was degraded. The discs are not defective so I tried to reassemble the array with the= original discs again: monosan:~ # mdadm -A /dev/md4 mdadm: WARNING /dev/dm-9 and /dev/dm-8 appear to have very similar supe= rblocks. If they are really different, please --zero the superblock on one If they are the same or overlap, please remove one from the DEVICE list in mdadm.conf. How can I extract the superblocks to check if they are really identical= ly? Thanks Lars -- 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