You can ignore this request. I tried to recreate the array and I was unable to recover. I moved to plan B so this is no longer needed. Thanks, Jared On Wed, Mar 5, 2014 at 4:16 PM, Jared Raddigan <jraddigan@xxxxxxx> wrote: > Using: > Debian 7 > mdadm - v3.2.5 - 18th May 2012 > > I had a working 5 disk (3TB each) Raid 6 array. I was running out of > room so I wanted to expand it. I added a SATA controller card and 3 > more 3TB drives following the > https://raid.wiki.kernel.org/index.php/Growing guide. > > The three additional drives failed shortly after the grow command and > further testing shows that the SATA card that I added is flakey at > best. It went to reshaping mode and the time to complete was about 25 > years :). Not able to get anywhere, I decided to reboot assuming I am > probably going to lose my data. I have already have moved to plan B > but recovering some data would be nice if possible. > > So I now have a RAID 6 array that wont start because it does not have > enough drives. I cant really try to re-add those drives because the I > don't trust the SATA card. It really only ran for probably 10 minutes > before it failed. Here is what I wanted to ask before I tried it. I > basically want to rebuild my array with the original 5 drives and see > if I can recover any data. > > I was going through the recovery guide and am now at the bottom > section "restore array by recreating." Would it be foolish to try and > recreate the array with only 5 original drives, something like this. > > mdadm --create --assume-clean --level=6 --raid-devices=5 > --size=2930133504 /dev/md0 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1 > /dev/sdf1 > > I had to change the size as when I used the value in the guide "Used > Dev Size/2" mdadm reported > > mdadm: /dev/sdf1 is smaller than given size. 2930133504K < 2930263552K > + metadata > > for each drive. If I use the 2930133504 it appears now that I can hit > Yes an proceed. The guide said before getting hasty post here so any > feedback would be appreciated. > > Thanks, > > > Jared > > > /dev/sdb1: > Magic : a92b4efc > Version : 1.2 > Feature Map : 0x4 > Array UUID : aad17236:47b3d29e:124f709c:5e61a7be > Name : backy3:0 (local to host backy3) > Creation Time : Tue Oct 11 14:27:53 2011 > Raid Level : raid6 > Raid Devices : 8 > > Avail Dev Size : 5860528128 (2794.52 GiB 3000.59 GB) > Array Size : 17581581312 (16767.10 GiB 18003.54 GB) > Used Dev Size : 5860527104 (2794.52 GiB 3000.59 GB) > Data Offset : 2048 sectors > Super Offset : 8 sectors > State : clean > Device UUID : 0b6dd63f:091a9e59:30443384:41314df2 > > Reshape pos'n : 199680 (195.03 MiB 204.47 MB) > Delta Devices : 3 (5->8) > > Update Time : Wed Mar 5 10:46:19 2014 > Checksum : e0b50220 - correct > Events : 98709 > > Layout : left-symmetric > Chunk Size : 512K > > Device Role : Active device 0 > Array State : AAAAA... ('A' == active, '.' == missing) > /dev/sdc1: > Magic : a92b4efc > Version : 1.2 > Feature Map : 0x4 > Array UUID : aad17236:47b3d29e:124f709c:5e61a7be > Name : backy3:0 (local to host backy3) > Creation Time : Tue Oct 11 14:27:53 2011 > Raid Level : raid6 > Raid Devices : 8 > > Avail Dev Size : 5860528128 (2794.52 GiB 3000.59 GB) > Array Size : 17581581312 (16767.10 GiB 18003.54 GB) > Used Dev Size : 5860527104 (2794.52 GiB 3000.59 GB) > Data Offset : 2048 sectors > Super Offset : 8 sectors > State : active > Device UUID : a3a2d182:8492d2a3:ad7e389e:54cd2955 > > Reshape pos'n : 199680 (195.03 MiB 204.47 MB) > Delta Devices : 3 (5->8) > > Update Time : Wed Mar 5 10:46:19 2014 > Checksum : eac6871c - correct > Events : 98709 > > Layout : left-symmetric > Chunk Size : 512K > > Device Role : Active device 1 > Array State : AAAAA... ('A' == active, '.' == missing) > /dev/sdd1: > Magic : a92b4efc > Version : 1.2 > Feature Map : 0x4 > Array UUID : aad17236:47b3d29e:124f709c:5e61a7be > Name : backy3:0 (local to host backy3) > Creation Time : Tue Oct 11 14:27:53 2011 > Raid Level : raid6 > Raid Devices : 8 > > Avail Dev Size : 5860528128 (2794.52 GiB 3000.59 GB) > Array Size : 17581581312 (16767.10 GiB 18003.54 GB) > Used Dev Size : 5860527104 (2794.52 GiB 3000.59 GB) > Data Offset : 2048 sectors > Super Offset : 8 sectors > State : active > Device UUID : ab14917c:3077a9fe:a14ec7d1:5de769d1 > > Reshape pos'n : 199680 (195.03 MiB 204.47 MB) > Delta Devices : 3 (5->8) > > Update Time : Wed Mar 5 10:46:19 2014 > Checksum : ef2bc777 - correct > Events : 98709 > > Layout : left-symmetric > Chunk Size : 512K > > Device Role : Active device 2 > Array State : AAAAA... ('A' == active, '.' == missing) > /dev/sde1: > Magic : a92b4efc > Version : 1.2 > Feature Map : 0x4 > Array UUID : aad17236:47b3d29e:124f709c:5e61a7be > Name : backy3:0 (local to host backy3) > Creation Time : Tue Oct 11 14:27:53 2011 > Raid Level : raid6 > Raid Devices : 8 > > Avail Dev Size : 5860528128 (2794.52 GiB 3000.59 GB) > Array Size : 17581581312 (16767.10 GiB 18003.54 GB) > Used Dev Size : 5860527104 (2794.52 GiB 3000.59 GB) > Data Offset : 2048 sectors > Super Offset : 8 sectors > State : active > Device UUID : 3d574712:561cbf1f:1efc6ca8:c987b6f8 > > Reshape pos'n : 199680 (195.03 MiB 204.47 MB) > Delta Devices : 3 (5->8) > > Update Time : Wed Mar 5 10:46:19 2014 > Checksum : a3e9fd18 - correct > Events : 98709 > > Layout : left-symmetric > Chunk Size : 512K > > Device Role : Active device 3 > Array State : AAAAA... ('A' == active, '.' == missing) > /dev/sdf1: > Magic : a92b4efc > Version : 1.2 > Feature Map : 0x4 > Array UUID : aad17236:47b3d29e:124f709c:5e61a7be > Name : backy3:0 (local to host backy3) > Creation Time : Tue Oct 11 14:27:53 2011 > Raid Level : raid6 > Raid Devices : 8 > > Avail Dev Size : 5860528128 (2794.52 GiB 3000.59 GB) > Array Size : 17581581312 (16767.10 GiB 18003.54 GB) > Used Dev Size : 5860527104 (2794.52 GiB 3000.59 GB) > Data Offset : 2048 sectors > Super Offset : 8 sectors > State : active > Device UUID : 9d0d3e75:76c85286:c3597412:13530f39 > > Reshape pos'n : 199680 (195.03 MiB 204.47 MB) > Delta Devices : 3 (5->8) > > Update Time : Wed Mar 5 10:46:19 2014 > Checksum : 17d48888 - correct > Events : 98709 > > Layout : left-symmetric > Chunk Size : 512K > > Device Role : Active device 4 > Array State : AAAAA... 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