Hi all,
After an hardware problem (dead motherboard), i've changed my server hardware.
There used to be an raid 5 array on this server (was a debian 5), composed of 4x 1Tb drives.
I'm not really sure of my array integrity so far. But should be ok.
(Tested on spared hardware but got some bad shutdowns, so I stopped and wait for new hardware)
The problem right know is that after installing a new debian 6, on new hardware, my devices names has changed.
Raid devices Before : sda1 sdb1 sdc1 sdd1
Raid devices After : sdb1 sdc1 sdd1 sde1
When i'm trying to assemble raid using
Code:
mdadm --assemble /dev/md0 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1
I receive
Code:
mdadm: /dev/md0 assembled from 2 drives and 1 spare - not enough to start the array.
root@pacem:~# cat /proc/mdstat
Personalities :
md0 : inactive sdd1[1](S) sdc1[4](S) sde1[3](S) sdb1[2](S)
3907039744 blocks
I've read here
http://ubuntuforums.org/archive/index.php/t-410136.html that it should be possible to use "mdadm --create" to restore this, but i'm a bit scared..
Any suggestions ?
Thanks a lot
Here's my "mdadm --examine" output for each drive
Code:
root@pacem:~# mdadm --examine /dev/sd[bcde]1
/dev/sdb1:
Magic : a92b4efc
Version : 0.90.00
UUID : 72f23314:6604bd26:2657f2ae:544b650d
Creation Time : Sun Sep 27 18:12:27 2009
Raid Level : raid5
Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
Array Size : 2930279808 (2794.53 GiB 3000.61 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 0
Update Time : Sat Apr 2 20:03:47 2011
State : clean
Active Devices : 3
Working Devices : 4
Failed Devices : 0
Spare Devices : 1
Checksum : cf55b9b8 - correct
Events : 120
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 2 8 49 2 active sync /dev/sdd1
0 0 0 0 0 removed
1 1 8 17 1 active sync /dev/sdb1
2 2 8 49 2 active sync /dev/sdd1
3 3 8 33 3 active sync /dev/sdc1
4 4 8 1 4 spare /dev/sda1
/dev/sdc1:
Magic : a92b4efc
Version : 0.90.00
UUID : 72f23314:6604bd26:2657f2ae:544b650d
Creation Time : Sun Sep 27 18:12:27 2009
Raid Level : raid5
Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
Array Size : 2930279808 (2794.53 GiB 3000.61 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 0
Update Time : Sat Apr 2 20:07:32 2011
State : clean
Active Devices : 2
Working Devices : 3
Failed Devices : 1
Spare Devices : 1
Checksum : cf55ba80 - correct
Events : 126
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 4 8 1 4 spare /dev/sda1
0 0 0 0 0 removed
1 1 8 17 1 active sync /dev/sdb1
2 2 0 0 2 faulty removed
3 3 8 33 3 active sync /dev/sdc1
4 4 8 1 4 spare /dev/sda1
/dev/sdd1:
Magic : a92b4efc
Version : 0.90.00
UUID : 72f23314:6604bd26:2657f2ae:544b650d
Creation Time : Sun Sep 27 18:12:27 2009
Raid Level : raid5
Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
Array Size : 2930279808 (2794.53 GiB 3000.61 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 0
Update Time : Sat Apr 2 20:07:32 2011
State : clean
Active Devices : 2
Working Devices : 3
Failed Devices : 1
Spare Devices : 1
Checksum : cf55ba90 - correct
Events : 126
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 1 8 17 1 active sync /dev/sdb1
0 0 0 0 0 removed
1 1 8 17 1 active sync /dev/sdb1
2 2 0 0 2 faulty removed
3 3 8 33 3 active sync /dev/sdc1
4 4 8 1 4 spare /dev/sda1
/dev/sde1:
Magic : a92b4efc
Version : 0.90.00
UUID : 72f23314:6604bd26:2657f2ae:544b650d
Creation Time : Sun Sep 27 18:12:27 2009
Raid Level : raid5
Used Dev Size : 976759936 (931.51 GiB 1000.20 GB)
Array Size : 2930279808 (2794.53 GiB 3000.61 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 0
Update Time : Sat Apr 2 20:07:32 2011
State : clean
Active Devices : 2
Working Devices : 3
Failed Devices : 1
Spare Devices : 1
Checksum : cf55baa4 - correct
Events : 126
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 3 8 33 3 active sync /dev/sdc1
0 0 0 0 0 removed
1 1 8 17 1 active sync /dev/sdb1
2 2 0 0 2 faulty removed
3 3 8 33 3 active sync /dev/sdc1
4 4 8 1 4 spare /dev/sda1
