Hi, please can someone help me with a raid array which as gone wrong On Friday a backup server was rebooted, but failed to boot, possibly with an unrelated issue On Monday someone booted from a usb disk to try and recover it they were originally able to assemble the array but now they are not, 2 out of the 5 drives are showing out of date. Device 1 is showing Bad Block Log : 512 entries available at offset 72 sectors Array State : AAAAA and is showing 256 less a events last updated 2 hours before the others Device 4 is showing Array State : A.AAA and 2 less events last update 1 hour before the others The rest all show Array State : A.AA. I've tried manually assembling without device 1, but even with --force it refused to assemble, force seems to do nothing at all, i am assuming this maybe because the array state has been updated to say missing for 2 devices. The example here https://raid.wiki.kernel.org/index.php/RAID_Recovery seems to suggest that in my situation recreating might be my only option Are there any better options before i go ahead and do this? If not is the best case to create with device 1 missing then try and recover once device 4 is back to normal? Is there anything i can backup other than the array stats that i already have? Also i am wonder if anyone can shed any light on how it might have got into this state? There are a few bad blocks showing on device 1, but am not sure if that is enough to point toward it being a drive failure on it, and if the last updates are reliable to point to when failures happened, nothing went wrong till this afternoon. Thanks If anyone can Help Copy of the full array status: /dev/sda: MBR Magic : aa55 Partition[0] : 60592833 sectors at 63 (type 0c) /dev/sdb: MBR Magic : aa55 Partition[0] : 1953521664 sectors at 2048 (type fd) /dev/sdc: MBR Magic : aa55 Partition[0] : 1953521664 sectors at 2048 (type fd) /dev/sdd: MBR Magic : aa55 Partition[0] : 1953521664 sectors at 2048 (type fd) /dev/sde: MBR Magic : aa55 Partition[0] : 1953521664 sectors at 2048 (type fd) /dev/sdf: MBR Magic : aa55 Partition[0] : 1953521664 sectors at 2048 (type fd) /dev/sda1: MBR Magic : aa55 Partition[0] : 432871117 sectors at 3224498923 (type 07) Partition[1] : 1953460034 sectors at 3272020941 (type 16) Partition[3] : 924335794 sectors at 50200576 (type 00) /dev/sdb1: Magic : a92b4efc Version : 1.2 Feature Map : 0x0 Array UUID : 7847e506:deaf87e5:7c6cd502:abb20cf1 Name : srv-bk1:0 Creation Time : Thu Jun 20 13:09:09 2013 Raid Level : raid5 Raid Devices : 5 Avail Dev Size : 1953259520 (931.39 GiB 1000.07 GB) Array Size : 3906516992 (3725.55 GiB 4000.27 GB) Used Dev Size : 1953258496 (931.39 GiB 1000.07 GB) Data Offset : 262144 sectors Super Offset : 8 sectors Unused Space : before=262064 sectors, after=1024 sectors State : clean Device UUID : 6b4406c8:0fd049d6:81c29c9a:7969b355 Update Time : Mon Dec 7 15:32:11 2015 Checksum : b242234c - correct Events : 1285255 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 0 Array State : A.AA. ('A' == active, '.' == missing, 'R' == replacing) /dev/sdc1: Magic : a92b4efc Version : 1.2 Feature Map : 0x2 Array UUID : xxxxxxxx:xxxxxxxx:xxxxxxxx:abb20cf1 Name : srv-bk1:0 Creation Time : Thu Jun 20 13:09:09 2013 Raid Level : raid5 Raid Devices : 5 Avail Dev Size : 1953259520 (931.39 GiB 1000.07 GB) Array Size : 3906516992 (3725.55 GiB 4000.27 GB) Used Dev Size : 1953258496 (931.39 GiB 1000.07 GB) Data Offset : 262144 sectors Super Offset : 8 sectors Recovery Offset : 152682776 sectors Unused Space : before=262056 sectors, after=1024 sectors State : clean Device UUID : 7c3d5188:39eddb20:96973dee:9c71dc89 Update Time : Mon Dec 7 12:40:28 2015 Bad Block Log : 512 entries available at offset 72 sectors Checksum : 4e0caeec - correct Events : 1284999 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 1 Array State : AAAAA ('A' == active, '.' == missing, 'R' == replacing) /dev/sdd1: Magic : a92b4efc Version : 1.2 Feature Map : 0x0 Array UUID : 7847e506:deaf87e5:7c6cd502:abb20cf1 Name : srv-bk1:0 Creation Time : Thu Jun 20 13:09:09 2013 Raid Level : raid5 Raid Devices : 5 Avail Dev Size : 1953259520 (931.39 GiB 1000.07 GB) Array Size : 3906516992 (3725.55 GiB 4000.27 GB) Used Dev Size : 1953258496 (931.39 GiB 1000.07 GB) Data Offset : 262144 sectors Super Offset : 8 sectors Unused Space : before=262064 sectors, after=1024 sectors State : clean Device UUID : 2ec58774:2cea69a3:660a0aba:98c57ed7 Update Time : Mon Dec 7 15:32:11 2015 Checksum : cd1c6232 - correct Events : 1285255 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 2 Array State : A.AA. ('A' == active, '.' == missing, 'R' == replacing) /dev/sde1: Magic : a92b4efc Version : 1.2 Feature Map : 0x0 Array UUID : 7847e506:deaf87e5:7c6cd502:abb20cf1 Name : srv-bk1:0 Creation Time : Thu Jun 20 13:09:09 2013 Raid Level : raid5 Raid Devices : 5 Avail Dev Size : 1953259520 (931.39 GiB 1000.07 GB) Array Size : 3906516992 (3725.55 GiB 4000.27 GB) Used Dev Size : 1953258496 (931.39 GiB 1000.07 GB) Data Offset : 262144 sectors Super Offset : 8 sectors Unused Space : before=262064 sectors, after=1024 sectors State : clean Device UUID : e784451d:b024c581:badf6818:2a8a481e Update Time : Mon Dec 7 15:32:11 2015 Checksum : f95df654 - correct Events : 1285255 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 3 Array State : A.AA. ('A' == active, '.' == missing, 'R' == replacing) /dev/sdf1: Magic : a92b4efc Version : 1.2 Feature Map : 0x0 Array UUID : 7847e506:deaf87e5:7c6cd502:abb20cf1 Name : srv-bk1:0 Creation Time : Thu Jun 20 13:09:09 2013 Raid Level : raid5 Raid Devices : 5 Avail Dev Size : 1953259520 (931.39 GiB 1000.07 GB) Array Size : 3906516992 (3725.55 GiB 4000.27 GB) Used Dev Size : 1953258496 (931.39 GiB 1000.07 GB) Data Offset : 262144 sectors Super Offset : 8 sectors Unused Space : before=262064 sectors, after=1024 sectors State : clean Device UUID : 119b942e:5012da9f:42384d61:5f81fd95 Update Time : Mon Dec 7 14:20:10 2015 Checksum : e95a3900 - correct Events : 1285253 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 4 Array State : A.AAA ('A' == active, '.' == missing, 'R' == replacing) -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
