From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Tran Subject: Re: assembly aborted, superblock is missing. (need help!) Date: Mon, 19 Sep 2005 17:27:17 -0500 Message-ID: <432F3B45.1010304@us.ibm.com> References: <6d5bedd8050915131148b8108a@mail.gmail.com> <200509162258.37730.a1426z@gawab.com> <432D3024.3080302@dtbb.net> <200509181426.33327.a1426z@gawab.com> <008801c5bc54$b9fd57f0$0400a8c0@dcccs> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <008801c5bc54$b9fd57f0$0400a8c0@dcccs> Sender: linux-raid-owner@vger.kernel.org To: JaniD++ Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hi Janos, The problem with disappearing MD superblock must be investigated. :( It is safe to re-create the raid0 array: mdadm -C /dev/md31 -l 0 -c 32 -n 4 /dev/md1 /dev/md2 /dev/md3 /dev/md4 -- Regards, Mike Tran JaniD++ wrote: >Hello list! > >I have try to switch from 2.6.13 to 14-rc1, but this kernel breaks my >device! > >The problem: ># mdadm -A -R -f /dev/md31 /dev/md1 /dev/md2 /dev/md3 /dev/md4 >mdadm: no RAID superblock on /dev/md1 >mdadm: /dev/md1 has no superblock - assembly aborted > > >md31 is a 8TB raid0 device. > >the 2. dev: ># mdadm -E /dev/md2 >/dev/md2: > Magic : a92b4efc > Version : 00.90.02 > UUID : 9a99d340:ab8f6bfc:bc8d42ed:79ce440e > Creation Time : Sun Jul 17 19:50:11 2005 > Raid Level : raid0 > Device Size : 1953583232 (1863.08 GiB 2000.47 GB) > Raid Devices : 4 > Total Devices : 4 >Preferred Minor : 31 > > Update Time : Sun Jul 17 19:50:11 2005 > State : active > Active Devices : 4 >Working Devices : 4 > Failed Devices : 0 > Spare Devices : 0 > Checksum : 1fd71b51 - correct > Events : 0.2 > > Chunk Size : 32K > > Number Major Minor RaidDevice State >this 1 9 2 1 active sync /dev/md2 > > 0 0 9 1 0 active sync /dev/md1 > 1 1 9 2 1 active sync /dev/md2 > 2 2 9 3 2 active sync /dev/md3 > 3 3 9 4 3 active sync /dev/md4 > >the 3. dev: > ># mdadm -E /dev/md3 >/dev/md3: > Magic : a92b4efc > Version : 00.90.02 > UUID : 9a99d340:ab8f6bfc:bc8d42ed:79ce440e > Creation Time : Sun Jul 17 19:50:11 2005 > Raid Level : raid0 > Device Size : 1953583232 (1863.08 GiB 2000.47 GB) > Raid Devices : 4 > Total Devices : 4 >Preferred Minor : 31 > > Update Time : Sun Jul 17 19:50:11 2005 > State : active > Active Devices : 4 >Working Devices : 4 > Failed Devices : 0 > Spare Devices : 0 > Checksum : 1fd71b54 - correct > Events : 0.2 > > Chunk Size : 32K > > Number Major Minor RaidDevice State >this 2 9 3 2 active sync /dev/md3 > > 0 0 9 1 0 active sync /dev/md1 > 1 1 9 2 1 active sync /dev/md2 > 2 2 9 3 2 active sync /dev/md3 > 3 3 9 4 3 active sync /dev/md4 > > > >the 4.dev: > ># mdadm -E /dev/md4 >/dev/md4: > Magic : a92b4efc > Version : 00.90.02 > UUID : 9a99d340:ab8f6bfc:bc8d42ed:79ce440e > Creation Time : Sun Jul 17 19:50:11 2005 > Raid Level : raid0 > Device Size : 1953583232 (1863.08 GiB 2000.47 GB) > Raid Devices : 4 > Total Devices : 4 >Preferred Minor : 31 > > Update Time : Sun Jul 17 19:50:11 2005 > State : active > Active Devices : 4 >Working Devices : 4 > Failed Devices : 0 > Spare Devices : 0 > Checksum : 1fd71b57 - correct > Events : 0.2 > > Chunk Size : 32K > > Number Major Minor RaidDevice State >this 3 9 4 3 active sync /dev/md4 > > 0 0 9 1 0 active sync /dev/md1 > 1 1 9 2 1 active sync /dev/md2 > 2 2 9 3 2 active sync /dev/md3 > 3 3 9 4 3 active sync /dev/md4 > > >but the md1 (the first dev) is this: ># mdadm -E /dev/md1 >mdadm: No super block found on /dev/md1 (Expected magic a92b4efc, got >56dfa32e) > > >How can I fix this? >Can somebody help? > >Thanks >Janos > >- >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 > > >