Peter Before attempting any recovery can I suggest that you get 4 x 2TB drives and dd the current drives so you have a backup. Then you can begin to think about performing the raid recovery in the knowledge you have a fallback position if it blows up. Regards Tony On 24 June 2016 at 20:55, Peter Gebhard <pgeb@xxxxxxxxxxxxxx> wrote: > 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 -- 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
