* Incative RAID5 (it should be active)
@ 2006-08-12 15:01 Jacob Madsen
2006-08-12 21:37 ` Jacob Madsen
0 siblings, 1 reply; 2+ messages in thread
From: Jacob Madsen @ 2006-08-12 15:01 UTC (permalink / raw)
To: linux-raid
Hey
I only have 4 sata slots in my computer and i have a raid5 array of
partitions on those 4 disks.
Today i needed a free sata slots, so i unplugged one of the disks and
booted with knoppix. I then did some work, turned of the computer and
plugged in the disk again.
I should say that i didnt use the array while using knoppix, so
everything should be intact.
I then expected to be able to hotadd the missing partition and use the
array as usual. But its inactive:
# mdadm --detail /dev/md8
mdadm: md device /dev/md8 does not appear to be active.
# cat /proc/mdstat
md8 : inactive sda10[1] sdd10[4] sdc10[3] sdb10[2]
545791744 blocks
I then stopped the array:
# mdadm -S /dev/md8
mdadm: stopped /dev/md8
And tryed to assemble it:
# mdadm --verbose --assemble /dev/md8 /dev/sda10 /dev/sdb10 /dev/sdc10
/dev/sdd10
mdadm: looking for devices for /dev/md8
mdadm: /dev/sda10 is identified as a member of /dev/md8, slot 1.
mdadm: /dev/sdb10 is identified as a member of /dev/md8, slot 2.
mdadm: /dev/sdc10 is identified as a member of /dev/md8, slot 3.
mdadm: /dev/sdd10 is identified as a member of /dev/md8, slot 4.
mdadm: no uptodate device for slot 0 of /dev/md8
mdadm: added /dev/sdb10 to /dev/md8 as 2
mdadm: added /dev/sdc10 to /dev/md8 as 3
mdadm: added /dev/sdd10 to /dev/md8 as 4
mdadm: added /dev/sda10 to /dev/md8 as 1
mdadm: /dev/md8 assembled from 2 drives and 1 spare - not enough to
start the array.
The last line indicate something is wrong, but i have no idea what to
do. (i still expect all the data to be intact)
Any good ideas will be appreciated alot!
/Jacob
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: Incative RAID5 (it should be active)
2006-08-12 15:01 Incative RAID5 (it should be active) Jacob Madsen
@ 2006-08-12 21:37 ` Jacob Madsen
0 siblings, 0 replies; 2+ messages in thread
From: Jacob Madsen @ 2006-08-12 21:37 UTC (permalink / raw)
To: Jacob Madsen; +Cc: linux-raid
Hey again
here is some additional information:
# mdadm --examine /dev/sda10 /dev/sdb10 /dev/sdc10 /dev/sdd10
/dev/sda10:
Magic : a92b4efc
Version : 00.90.00
UUID : fc549abf:0e1662f3:3b60b5c3:7a8e6fc7
Creation Time : Tue Oct 19 20:27:43 2004
Raid Level : raid5
Device Size : 136447936 (130.13 GiB 139.72 GB)
Array Size : 409343808 (390.38 GiB 419.17 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 8
Update Time : Sat Aug 12 06:13:55 2006
State : clean
Active Devices : 2
Working Devices : 3
Failed Devices : 1
Spare Devices : 1
Checksum : fc3ffb29 - correct
Events : 0.35808971
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 1 8 10 1 active sync /dev/sda10
0 0 0 0 0 removed
1 1 8 10 1 active sync /dev/sda10
2 2 8 26 2 active sync /dev/sdb10
3 3 0 0 3 faulty removed
4 4 8 58 4 spare /dev/sdd10
/dev/sdb10:
Magic : a92b4efc
Version : 00.90.00
UUID : fc549abf:0e1662f3:3b60b5c3:7a8e6fc7
Creation Time : Tue Oct 19 20:27:43 2004
Raid Level : raid5
Device Size : 136447936 (130.13 GiB 139.72 GB)
Array Size : 409343808 (390.38 GiB 419.17 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 8
Update Time : Sat Aug 12 06:13:55 2006
State : clean
Active Devices : 2
Working Devices : 3
Failed Devices : 1
Spare Devices : 1
Checksum : fc3ffb3b - correct
Events : 0.35808971
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 2 8 26 2 active sync /dev/sdb10
0 0 0 0 0 removed
1 1 8 10 1 active sync /dev/sda10
2 2 8 26 2 active sync /dev/sdb10
3 3 0 0 3 faulty removed
4 4 8 58 4 spare /dev/sdd10
/dev/sdc10:
Magic : a92b4efc
Version : 00.90.00
UUID : fc549abf:0e1662f3:3b60b5c3:7a8e6fc7
Creation Time : Tue Oct 19 20:27:43 2004
Raid Level : raid5
Device Size : 136447936 (130.13 GiB 139.72 GB)
Array Size : 409343808 (390.38 GiB 419.17 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 8
Update Time : Sat Aug 12 00:11:10 2006
State : clean
Active Devices : 3
Working Devices : 4
Failed Devices : 0
Spare Devices : 1
Checksum : fc3fa60b - correct
Events : 0.35808947
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 3 8 42 3 active sync /dev/sdc10
0 0 0 0 0 removed
1 1 8 10 1 active sync /dev/sda10
2 2 8 26 2 active sync /dev/sdb10
3 3 8 42 3 active sync /dev/sdc10
4 4 8 58 4 spare /dev/sdd10
/dev/sdd10:
Magic : a92b4efc
Version : 00.90.00
UUID : fc549abf:0e1662f3:3b60b5c3:7a8e6fc7
Creation Time : Tue Oct 19 20:27:43 2004
Raid Level : raid5
Device Size : 136447936 (130.13 GiB 139.72 GB)
Array Size : 409343808 (390.38 GiB 419.17 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 8
Update Time : Sat Aug 12 06:13:55 2006
State : clean
Active Devices : 2
Working Devices : 3
Failed Devices : 1
Spare Devices : 1
Checksum : fc3ffb59 - correct
Events : 0.35808971
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 4 8 58 4 spare /dev/sdd10
0 0 0 0 0 removed
1 1 8 10 1 active sync /dev/sda10
2 2 8 26 2 active sync /dev/sdb10
3 3 0 0 3 faulty removed
4 4 8 58 4 spare /dev/sdd10
^ permalink raw reply [flat|nested] 2+ messages in thread
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