Hello, I have been asked to attempt data recovery on a RAID5 array which appears to have had two disk failures (in an array of four disks). I am gratefully hoping that some on this list could offer recommendations for my next steps. I have provided below the current state of the array per https://raid.wiki.kernel.org/index.php/RAID_Recovery. It appears from the output below that one of the disks (sdd1) failed last year and the admin did not notice this. Now, it appears a second disk (sdg1) has recently had read errors and was kicked out of the array. Should I try to restore the array using the recreate_array.pl script provided on the RAID_Recovery site? Should I then try to recreate the array and/or perform ‘fsck’? Thank you greatly in advance! raid.status: /dev/sdd1: Magic : a92b4efc Version : 1.2 Feature Map : 0x0 Array UUID : bfb03f95:834b520d:60f773d8:ecb6b9e3 Name : <->:0 Creation Time : Tue Nov 29 17:33:39 2011 Raid Level : raid5 Raid Devices : 4 Avail Dev Size : 3907024896 (1863.01 GiB 2000.40 GB) Array Size : 5860535808 (5589.04 GiB 6001.19 GB) Used Dev Size : 3907023872 (1863.01 GiB 2000.40 GB) Data Offset : 2048 sectors Super Offset : 8 sectors State : clean Device UUID : ec1a6336:0a991298:5b409bf1:4585ccbe Update Time : Sun Jun 7 02:28:00 2015 Checksum : f9323080 - correct Events : 96203 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 0 Array State : AAAA ('A' == active, '.' == missing) /dev/sde1: Magic : a92b4efc Version : 1.2 Feature Map : 0x0 Array UUID : bfb03f95:834b520d:60f773d8:ecb6b9e3 Name : <->:0 Creation Time : Tue Nov 29 17:33:39 2011 Raid Level : raid5 Raid Devices : 4 Avail Dev Size : 3907024896 (1863.01 GiB 2000.40 GB) Array Size : 5860535808 (5589.04 GiB 6001.19 GB) Used Dev Size : 3907023872 (1863.01 GiB 2000.40 GB) Data Offset : 2048 sectors Super Offset : 8 sectors State : clean Device UUID : ed13b045:ca75ab96:83045f97:e4fd62cb Update Time : Sun Jun 19 19:43:31 2016 Checksum : bb6a905f - correct Events : 344993 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 3 Array State : .A.A ('A' == active, '.' == missing) /dev/sdf1: Magic : a92b4efc Version : 1.2 Feature Map : 0x0 Array UUID : bfb03f95:834b520d:60f773d8:ecb6b9e3 Name : <->:0 Creation Time : Tue Nov 29 17:33:39 2011 Raid Level : raid5 Raid Devices : 4 Avail Dev Size : 3907024896 (1863.01 GiB 2000.40 GB) Array Size : 5860535808 (5589.04 GiB 6001.19 GB) Used Dev Size : 3907023872 (1863.01 GiB 2000.40 GB) Data Offset : 2048 sectors Super Offset : 8 sectors State : clean Device UUID : a1ea11e0:6465fe26:483f133d:680014b3 Update Time : Sun Jun 19 19:43:31 2016 Checksum : 738493f3 - correct Events : 344993 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 1 Array State : .A.A ('A' == active, '.' == missing) /dev/sdg1: Magic : a92b4efc Version : 1.2 Feature Map : 0x0 Array UUID : bfb03f95:834b520d:60f773d8:ecb6b9e3 Name : <->:0 Creation Time : Tue Nov 29 17:33:39 2011 Raid Level : raid5 Raid Devices : 4 Avail Dev Size : 3907024896 (1863.01 GiB 2000.40 GB) Array Size : 5860535808 (5589.04 GiB 6001.19 GB) Used Dev Size : 3907023872 (1863.01 GiB 2000.40 GB) Data Offset : 2048 sectors Super Offset : 8 sectors State : active Device UUID : a9737439:17f81210:484d4f4c:c3d34a8a Update Time : Sun Jun 19 12:18:49 2016 Checksum : 9c6d24bf - correct Events : 343949 Layout : left-symmetric Chunk Size : 512K Device Role : Active device 2 Array State : .AAA ('A' == active, '.' == missing) -- 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
