From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bhatia Amit Subject: Re: Cannot start array on disk Date: Thu, 21 Jul 2016 02:00:29 +0000 (UTC) Message-ID: <1334935791.2305089.1469066429563.JavaMail.yahoo@mail.yahoo.com> References: <1124605843.526681.1468785592654.JavaMail.yahoo.ref@mail.yahoo.com> <1124605843.526681.1468785592654.JavaMail.yahoo@mail.yahoo.com> <73583e52-ca6b-b043-cbae-02c8a122be24@turmel.org> <1436537429.1672198.1468980612541.JavaMail.yahoo@mail.yahoo.com> <1537154003.1687848.1468983169996.JavaMail.yahoo@mail.yahoo.com> <6b958d9f-ec61-3b87-fcd7-ff63c0af32fe@turmel.org> Reply-To: Bhatia Amit Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <6b958d9f-ec61-3b87-fcd7-ff63c0af32fe@turmel.org> Sender: linux-raid-owner@vger.kernel.org To: Phil Turmel , "linux-raid@vger.kernel.org" List-Id: linux-raid.ids > I'm not sure if this is supported, by try specifying the version along > with --examine for each of v0.90, v1.0, v1.1, and v1.2 to see if any > difference shows. Paste the results from each. Hi Phil Only metadata v1.0 seems to be valid for sdc4. $ sudo mdadm --examine /dev/sdc4 --metadata=0.9 mdadm: No super block found on /dev/sdc4 (Expected magic a92b4efc, got 00000000) $ $ sudo mdadm --examine /dev/sdc4 --metadata=1.0 /dev/sdc4: Magic : a92b4efc Version : 1.0 Feature Map : 0x0 Array UUID : 374e689e:3bfd050c:ab0b0dce:2d50f5fd Name : MyBookLiveDuo:3 Creation Time : Mon Sep 16 14:53:47 2013 Raid Level : linear Raid Devices : 2 Avail Dev Size : 5851500528 (2790.21 GiB 2995.97 GB) Used Dev Size : 0 Super Offset : 5851500528 sectors State : clean Device UUID : 9096f74b:0a8f2b61:93347be3:6d3b6c1b Update Time : Mon Sep 16 14:53:47 2013 Checksum : 77aa5963 - correct Events : 0 Rounding : 0K Device Role : Active device 0 Array State : AA ('A' == active, '.' == missing) $ $ sudo mdadm --examine /dev/sdc4 --metadata=1.1 mdadm: No super block found on /dev/sdc4 (Expected magic a92b4efc, got 00000000) $ $ sudo mdadm --examine /dev/sdc4 --metadata=1.2 mdadm: No super block found on /dev/sdc4 (Expected magic a92b4efc, got 00000000) $ $ cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md126 : active raid1 sdc3[2] 500724 blocks super 1.0 [2/1] [_U] md127 : inactive sdc4[0](S) 2925750264 blocks super 1.0 unused devices: $ $ sudo mdadm --examine --scan ARRAY /dev/md/2 metadata=1.0 UUID=7c040c5e:9c30ac6d:e534a129:20457e22 name=MyBookLiveDuo:2 ARRAY /dev/md/3 metadata=1.0 UUID=374e689e:3bfd050c:ab0b0dce:2d50f5fd name=MyBookLiveDuo:3 $ Thanks, Amit