Hi all, I am a newbie in the RAID field but i encountered some problems with my RAID5 configuration on a QNAP NAS machine. In particular i added a 3TB drive and the array seemed to be rebuilt automatically. Originally i had 3 3TB drives on it. The rebuilt finished and i was able to access my data. For some weird reason one of the drives was not added and i tried to expand the RAID capacity. The expand failed but still no problems... When i rebooted the system however the RAID became inactive and now i cannot access any of the data. Below you can see the mdadm —examine information for the 4 drives. I saw a thread that recreating the RAID may solve the issue (https://raid.wiki.kernel.org/index.php/RAID_Recovery). Before going to that path though i wanted to see your take. Thanks, Nicolas /dev/sda3: Magic : a92b4efc Version : 1.0 Feature Map : 0x0 Array UUID : 11d32674:4247f385:74ee352b:5e4c22c7 Name : 0 Creation Time : Wed Jan 9 02:29:02 2013 Raid Level : raid5 Raid Devices : 4 Used Dev Size : 5857395112 (2793.02 GiB 2998.99 GB) Array Size : 17572185216 (8379.07 GiB 8996.96 GB) Used Size : 5857395072 (2793.02 GiB 2998.99 GB) Super Offset : 5857395368 sectors State : clean Device UUID : 650aa6e2:c725d7f0:b6c8a5fb:8f0ed37f Update Time : Thu Oct 20 08:33:37 2016 Checksum : bb791848 - correct Events : 175176 Layout : left-symmetric Chunk Size : 64K Array Slot : 2 (0, failed, 2, failed, 3, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed) Array State : u_Uu 381 failed /dev/sdb3: Magic : a92b4efc Version : 00.90.00 UUID : 3fe6d5d4:5b9d61f2:4f7ddb81:e4ae2138 Creation Time : Thu Jun 7 19:50:56 2012 Raid Level : raid5 Used Dev Size : 1951945600 (1861.52 GiB 1998.79 GB) Array Size : 5855836800 (5584.56 GiB 5996.38 GB) Raid Devices : 4 Total Devices : 4 Preferred Minor : 0 Update Time : Sun Oct 23 21:05:33 2016 State : clean Active Devices : 4 Working Devices : 4 Failed Devices : 0 Spare Devices : 0 Checksum : 968897f8 - correct Events : 0.12252139 Layout : left-symmetric Chunk Size : 64K Number Major Minor RaidDevice State this 2 8 19 2 active sync /dev/sdb3 0 0 8 3 0 active sync /dev/sda3 1 1 8 35 1 active sync /dev/sdc3 2 2 8 19 2 active sync /dev/sdb3 3 3 8 51 3 active sync /dev/sdd3 /dev/sdc3: Magic : a92b4efc Version : 00.90.00 UUID : 3fe6d5d4:5b9d61f2:4f7ddb81:e4ae2138 Creation Time : Thu Jun 7 19:50:56 2012 Raid Level : raid5 Used Dev Size : 1951945600 (1861.52 GiB 1998.79 GB) Array Size : 5855836800 (5584.56 GiB 5996.38 GB) Raid Devices : 4 Total Devices : 4 Preferred Minor : 0 Update Time : Sun Oct 23 21:05:33 2016 State : clean Active Devices : 4 Working Devices : 4 Failed Devices : 0 Spare Devices : 0 Checksum : 96889806 - correct Events : 0.12252139 Layout : left-symmetric Chunk Size : 64K Number Major Minor RaidDevice State this 1 8 35 1 active sync /dev/sdc3 0 0 8 3 0 active sync /dev/sda3 1 1 8 35 1 active sync /dev/sdc3 2 2 8 19 2 active sync /dev/sdb3 3 3 8 51 3 active sync /dev/sdd3 /dev/sdd3: Magic : a92b4efc Version : 1.0 Feature Map : 0x0 Array UUID : 11d32674:4247f385:74ee352b:5e4c22c7 Name : 0 Creation Time : Wed Jan 9 02:29:02 2013 Raid Level : raid5 Raid Devices : 4 Used Dev Size : 5857395112 (2793.02 GiB 2998.99 GB) Array Size : 17572185216 (8379.07 GiB 8996.96 GB) Used Size : 5857395072 (2793.02 GiB 2998.99 GB) Super Offset : 5857395368 sectors State : clean Device UUID : 0b3406a9:15fd802f:e9e3ed19:1c684e54 Update Time : Thu Oct 20 09:45:06 2016 Checksum : b3469ebd - correct Events : 175176 Layout : left-symmetric Chunk Size : 64K Array Slot : 4 (0, failed, 2, failed, 3, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed, failed) Array State : u_uU 381 failed -- 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
