From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Knight Subject: assembling array after disk failure Date: Sat, 26 Oct 2013 17:04:31 -0400 Message-ID: <526C2E5F.1060507@woh.rr.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hello after some trouble with disks, I am trying to reassemble an array. When I start the array, I am told I don't have enough disks to start. What is really strange to me is that when I examine the disks in the array, mdadm gives me different overall information for different disks. What do I need to do to assemble the array? **[root@server etc]# mdadm -As **mdadm: /dev/md127 assembled from 3 drives - not enough to start the array.** *[root@server etc]# cat /proc/mdstat* Personalities : md127 : inactive sdf[2](S) sde[4](S) sdb[3](S) sdc[1](S) sdd[0](S) 9767572480 blocks super 0.91 unused devices: *[root@server etc]# mdadm --examine /dev/sdb* /dev/sdb: Magic : a92b4efc Version : 0.91.00 UUID : ed465281:7b68fb12:01f9e43d:ac30fbff (local to host server) Creation Time : Sun Feb 20 18:39:42 2011 Raid Level : raid5 Used Dev Size : 1953514496 (1863.02 GiB 2000.40 GB) Array Size : 7814057984 (7452.07 GiB 8001.60 GB) Raid Devices : 5 Total Devices : 5 Preferred Minor : 127 Reshape pos'n : 7736445008 (7378.05 GiB 7922.12 GB) Delta Devices : 1 (4->5) Update Time : Tue Oct 22 16:43:25 2013 State : active Active Devices : 3 Working Devices : 3 Failed Devices : 1 Spare Devices : 0 Checksum : 6e803a11 - correct Events : 15471 Layout : left-symmetric Chunk Size : 4K Number Major Minor RaidDevice State this 3 8 16 3 active sync /dev/sdb 0 0 0 0 0 removed 1 1 0 0 1 faulty removed 2 2 8 80 2 active sync /dev/sdf 3 3 8 16 3 active sync /dev/sdb 4 4 8 64 4 active sync /dev/sde *[root@server etc]# mdadm --examine /dev/sdc* /dev/sdc: Magic : a92b4efc Version : 0.91.00 UUID : ed465281:7b68fb12:01f9e43d:ac30fbff (local to host server) Creation Time : Sun Feb 20 18:39:42 2011 Raid Level : raid5 Used Dev Size : 1953514496 (1863.02 GiB 2000.40 GB) Array Size : 7814057984 (7452.07 GiB 8001.60 GB) Raid Devices : 5 Total Devices : 5 Preferred Minor : 127 Reshape pos'n : 7736445008 (7378.05 GiB 7922.12 GB) Delta Devices : 1 (4->5) Update Time : Tue Oct 22 14:42:50 2013 State : clean Active Devices : 5 Working Devices : 5 Failed Devices : 0 Spare Devices : 0 Checksum : 6e805a2a - correct Events : 15468 Layout : left-symmetric Chunk Size : 4K Number Major Minor RaidDevice State this 1 8 32 1 active sync /dev/sdc 0 0 8 48 0 active sync /dev/sdd 1 1 8 32 1 active sync /dev/sdc 2 2 8 80 2 active sync /dev/sdf 3 3 8 16 3 active sync /dev/sdb 4 4 8 64 4 active sync /dev/sde *[root@server etc]# mdadm --examine /dev/sdd* /dev/sdd: Magic : a92b4efc Version : 0.91.00 UUID : ed465281:7b68fb12:01f9e43d:ac30fbff (local to host server) Creation Time : Sun Feb 20 18:39:42 2011 Raid Level : raid5 Used Dev Size : 1953514496 (1863.02 GiB 2000.40 GB) Array Size : 7814057984 (7452.07 GiB 8001.60 GB) Raid Devices : 5 Total Devices : 5 Preferred Minor : 127 Reshape pos'n : 7736445008 (7378.05 GiB 7922.12 GB) Delta Devices : 1 (4->5) Update Time : Tue Oct 22 14:42:50 2013 State : clean Active Devices : 5 Working Devices : 5 Failed Devices : 0 Spare Devices : 0 Checksum : 6e805a38 - correct Events : 15468 Layout : left-symmetric Chunk Size : 4K Number Major Minor RaidDevice State this 0 8 48 0 active sync /dev/sdd 0 0 8 48 0 active sync /dev/sdd 1 1 8 32 1 active sync /dev/sdc 2 2 8 80 2 active sync /dev/sdf 3 3 8 16 3 active sync /dev/sdb 4 4 8 64 4 active sync /dev/sde *[root@server etc]# mdadm --examine /dev/sde* /dev/sde: Magic : a92b4efc Version : 0.91.00 UUID : ed465281:7b68fb12:01f9e43d:ac30fbff (local to host server) Creation Time : Sun Feb 20 18:39:42 2011 Raid Level : raid5 Used Dev Size : 1953514496 (1863.02 GiB 2000.40 GB) Array Size : 7814057984 (7452.07 GiB 8001.60 GB) Raid Devices : 5 Total Devices : 5 Preferred Minor : 127 Reshape pos'n : 7736445008 (7378.05 GiB 7922.12 GB) Delta Devices : 1 (4->5) Update Time : Tue Oct 22 16:43:25 2013 State : active Active Devices : 3 Working Devices : 3 Failed Devices : 1 Spare Devices : 0 Checksum : 6e803a43 - correct Events : 15471 Layout : left-symmetric Chunk Size : 4K Number Major Minor RaidDevice State this 4 8 64 4 active sync /dev/sde 0 0 0 0 0 removed 1 1 0 0 1 faulty removed 2 2 8 80 2 active sync /dev/sdf 3 3 8 16 3 active sync /dev/sdb 4 4 8 64 4 active sync /dev/sde *[root@server etc]# mdadm --examine /dev/sdf* /dev/sdf: Magic : a92b4efc Version : 0.91.00 UUID : ed465281:7b68fb12:01f9e43d:ac30fbff (local to host server) Creation Time : Sun Feb 20 18:39:42 2011 Raid Level : raid5 Used Dev Size : 1953514496 (1863.02 GiB 2000.40 GB) Array Size : 7814057984 (7452.07 GiB 8001.60 GB) Raid Devices : 5 Total Devices : 5 Preferred Minor : 127 Reshape pos'n : 7736445008 (7378.05 GiB 7922.12 GB) Delta Devices : 1 (4->5) Update Time : Tue Oct 22 16:43:25 2013 State : active Active Devices : 3 Working Devices : 3 Failed Devices : 1 Spare Devices : 0 Checksum : 6e803a4f - correct Events : 15471 Layout : left-symmetric Chunk Size : 4K Number Major Minor RaidDevice State this 2 8 80 2 active sync /dev/sdf 0 0 0 0 0 removed 1 1 0 0 1 faulty removed 2 2 8 80 2 active sync /dev/sdf 3 3 8 16 3 active sync /dev/sdb 4 4 8 64 4 active sync /dev/sde