Hi,
My raid 5 is in a strange state. the mdstat tell me is degraded, but
when i check the disk that should be in the raid anymore it tell me
everything is right ... I'm lost
#cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 sdc1[3] sdd1[1]
3907021568 blocks super 1.2 level 5, 128k chunk, algorithm 2 [3/2] [UU_]
unused devices: <none>
so my third disk is unused i check with :
#mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sun Mar 4 22:49:14 2012
Raid Level : raid5
Array Size : 3907021568 (3726.03 GiB 4000.79 GB)
Used Dev Size : 1953510784 (1863.01 GiB 2000.40 GB)
Raid Devices : 3
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Sun Mar 30 23:01:35 2014
State : clean, degraded
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 128K
Name : debian:0
UUID : bf3c605b:9699aa55:d45119a2:7ba58d56
Events : 255801
Number Major Minor RaidDevice State
3 8 33 0 active sync /dev/sdc1
1 8 49 1 active sync /dev/sdd1
2 0 0 2 removed
after verify what says the disk i got confuse :
#mdadm --examine /dev/sdb1
/dev/sdb1:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : bf3c605b:9699aa55:d45119a2:7ba58d56
Name : debian:0
Creation Time : Sun Mar 4 22:49:14 2012
Raid Level : raid5
Raid Devices : 3
Avail Dev Size : 3907021954 (1863.01 GiB 2000.40 GB)
Array Size : 7814043136 (3726.03 GiB 4000.79 GB)
Used Dev Size : 3907021568 (1863.01 GiB 2000.40 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
State : clean
Device UUID : f9059dfb:74af1ab7:bc1465b1:e2ff30ba
Update Time : Sun Jan 5 04:11:41 2014
Bad Block Log : 512 entries available at offset 2032 sectors
Checksum : 7df1fefc - correct
Events : 436
Layout : left-symmetric
Chunk Size : 128K
Device Role : Active device 2
Array State : AAA ('A' == active, '.' == missing)
so there i tried to re-add the disk that doesn't works
so i tred to stop the raid and assemble it again but it doesn't work either
#mdadm --stop /dev/md0
#mdadm --assemble --force /dev/md0 /dev/sd[bcd]1
mdadm: /dev/md0 has been started with 2 drives (out of 3).
can you help me guys ?
Thanks by advance
ps: i've got mdadm 3.3-devel i would update it but don't how to do ...
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