Help!
Long story short - I was watching a movie off my RAID6 array. Got a smart error warning
'Device: /dev/sdc [SAT], ATA error count increased from 30 to 31'
I went to investigate and found:
Error 31 occurred at disk power-on lifetime: 8461 hours (352 days + 13
hours)
When the command that caused the error occurred, the device was active
or idle.
After command completion occurred, registers were:
ER ST SC SN CL CH DH
-- -- -- -- -- -- --
84 51 28 50 bd 49 47
Commands leading to the command that caused the error were:
CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
-- -- -- -- -- -- -- -- ---------------- --------------------
61 38 08 3f bd 49 40 08 00:38:33.100 WRITE FPDMA QUEUED
61 08 00 7f bd 49 40 08 00:38:33.100 WRITE FPDMA QUEUED
61 08 00 97 bd 49 40 08 00:38:33.000 WRITE FPDMA QUEUED
ea 00 00 00 00 00 a0 08 00:38:33.000 FLUSH CACHE EXT
61 08 00 bf 4b 38 40 08 00:38:33.000 WRITE FPDMA QUEUED
I then emailed myself some error logs and shut the machine down. This drive has caused me problems before - the last time when the cat knocked the computer over and dislodged the controller card. But several echo "check" sync_action later and several weeks I have not had a peep out of it.
ANYWAYS. after the reboot the array wont assemble (is that normal?)
Aug 10 22:00:07 mangalore kernel: md: running:
<sdg1><sdf1><sde1><sdd1><sdb1> <sda1>
Aug 10 22:00:07 mangalore kernel: raid5: md4 is not clean -- starting
background reconstruction
Aug 10 22:00:07 mangalore kernel: raid5: device sdg1 operational as raid
disk 0
Aug 10 22:00:07 mangalore kernel: raid5: device sdf1 operational as raid
disk 6
Aug 10 22:00:07 mangalore kernel: raid5: device sde1 operational as raid
disk 2
Aug 10 22:00:07 mangalore kernel: raid5: device sdd1 operational as raid
disk 4
Aug 10 22:00:07 mangalore kernel: raid5: device sdb1 operational as raid
disk 5
Aug 10 22:00:07 mangalore kernel: raid5: device sda1 operational as raid
disk 1
Aug 10 22:00:07 mangalore kernel: raid5: allocated 7343kB for md4
Aug 10 22:00:07 mangalore kernel: 0: w=1 pa=0 pr=7 m=2 a=2 r=7 op1=0
op2=0
Aug 10 22:00:07 mangalore kernel: 6: w=2 pa=0 pr=7 m=2 a=2 r=7 op1=0
op2=0
Aug 10 22:00:07 mangalore kernel: 2: w=3 pa=0 pr=7 m=2 a=2 r=7 op1=0
op2=0
Aug 10 22:00:07 mangalore kernel: 4: w=4 pa=0 pr=7 m=2 a=2 r=7 op1=0
op2=0
Aug 10 22:00:07 mangalore kernel: 5: w=5 pa=0 pr=7 m=2 a=2 r=7 op1=0
op2=0
Aug 10 22:00:07 mangalore kernel: 1: w=6 pa=0 pr=7 m=2 a=2 r=7 op1=0
op2=0
Aug 10 22:00:07 mangalore kernel: raid5: cannot start dirty degraded
array for md4
Aug 10 22:00:07 mangalore kernel: RAID5 conf printout:
Aug 10 22:00:07 mangalore kernel: --- rd:7 wd:6
Aug 10 22:00:07 mangalore kernel: disk 0, o:1, dev:sdg1
Aug 10 22:00:07 mangalore kernel: disk 1, o:1, dev:sda1
Aug 10 22:00:07 mangalore kernel: disk 2, o:1, dev:sde1
Aug 10 22:00:07 mangalore kernel: disk 4, o:1, dev:sdd1
Aug 10 22:00:07 mangalore kernel: disk 5, o:1, dev:sdb1
Aug 10 22:00:07 mangalore kernel: disk 6, o:1, dev:sdf1
Aug 10 22:00:07 mangalore kernel: raid5: failed to run raid set md4
Aug 10 22:00:07 mangalore kernel: md: pers->run() failed ...
Aug 10 22:00:07 mangalore kernel: md: do_md_run() returned -5
Aug 10 22:00:07 mangalore kernel: md: md4 stopped.
It appears sdc has an invalid superblock?
This is the 'examine' from sdc1 (note the checksum)
/dev/sdc1:
Magic : a92b4efc
Version : 0.90.00
UUID : 7438efd1:9e6ca2b5:d6b88274: 7003b1d3
Creation Time : Thu Oct 11 00:01:49 2007
Raid Level : raid6
Used Dev Size : 488383936 (465.76 GiB 500.11 GB)
Array Size : 2441919680 (2328.80 GiB 2500.53 GB)
Raid Devices : 7
Total Devices : 7
Preferred Minor : 4
Update Time : Tue Aug 10 21:39:49 2010
State : active
Active Devices : 7
Working Devices : 7
Failed Devices : 0
Spare Devices : 0
Checksum : b335b4e3 - expected b735b4e3
Events : 1860555
Layout : left-symmetric
Chunk Size : 64K
Number Major Minor RaidDevice State
this 3 8 33 3 active sync /dev/sdc1
0 0 8 97 0 active sync /dev/sdg1
1 1 8 1 1 active sync /dev/sda1
2 2 8 65 2 active sync /dev/sde1
3 3 8 33 3 active sync /dev/sdc1
4 4 8 49 4 active sync /dev/sdd1
5 5 8 17 5 active sync /dev/sdb1
6 6 8 81 6 active sync /dev/sdf1
Anyways... I am ASSUMING mdadm has not assembled the array to be on the safe side? i have not done anything.. no force... no assume clean.. I wanted to be sure?
Should i remove sdc1 from the array? It should then assemble? I have 2 spare drives that I am getting around to using to replace this drive and the other 500GB.. so should I remove sdc1... and try and re-add or just put the new drive in?
atm I have 'stop'ped the array and got badblocks running....
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