Hi,
I have a RAID-5 set up with the following raidtab:
raiddev /dev/md0
raid-level 5
nr-raid-disks 4
nr-spare-disks 0
persistent-superblock 1
parity-algorithm left-symmetric
chunk-size 256
device /dev/hde
raid-disk 0
device /dev/hdg
raid-disk 1
device /dev/hdi
raid-disk 2
device /dev/hdk
raid-disk 3
My hde has failed some time ago, leaving some
hde: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hde: dma_intr: error=0x84 { DriveStatusError BadCRC }
messages in the syslog.
I wanted to get sure it really was damaged, so I did a badblocks
(read-only) scan on /dev/hde. It actually found a bad sector on the
disk.
I wanted to take the disk out to get me a new one, but unfortunately my
hdg seems to have run into trouble too, now. I also have some
SeekComplete/BadCRC errors in my log for that disk, too.
Furthermore, i got this:
Jul 25 10:35:49 blackbox kernel: ide: failed opcode was: unknown
Jul 25 10:35:49 blackbox kernel: hdg: DMA disabled
Jul 25 10:35:49 blackbox kernel: PDC202XX: Secondary channel reset.
Jul 25 10:35:49 blackbox kernel: PDC202XX: Primary channel reset.
Jul 25 10:35:49 blackbox kernel: hde: lost interrupt
Jul 25 10:35:49 blackbox kernel: ide3: reset: master: error (0x00?)
Jul 25 10:35:49 blackbox kernel: end_request: I/O error, dev hdg, sector 488396928
Jul 25 10:35:49 blackbox kernel: end_request: I/O error, dev hdg, sector 159368976
Jul 25 10:35:49 blackbox kernel: end_request: I/O error, dev hdg, sector 159368984
Jul 25 10:35:49 blackbox kernel: end_request: I/O error, dev hdg, sector 159368992
Jul 25 10:35:49 blackbox kernel: end_request: I/O error, dev hdg, sector 159369000
Jul 25 10:35:49 blackbox kernel: end_request: I/O error, dev hdg, sector 159369008
Jul 25 10:35:49 blackbox kernel: end_request: I/O error, dev hdg, sector 159369016
Jul 25 10:35:49 blackbox kernel: end_request: I/O error, dev hdg, sector 159369024
Jul 25 10:35:49 blackbox kernel: end_request: I/O error, dev hdg, sector 159369032
Jul 25 10:35:49 blackbox kernel: md: write_disk_sb failed for device hdg
Jul 25 10:35:49 blackbox kernel: lost page write due to I/O error on md0
Jul 25 10:35:49 blackbox kernel: lost page write due to I/O error on md0
Jul 25 10:35:49 blackbox kernel: RAID5 conf printout:
Jul 25 10:35:49 blackbox kernel: --- rd:4 wd:2 fd:2
Jul 25 10:35:49 blackbox kernel: disk 0, o:1, dev:hdk
Jul 25 10:35:49 blackbox kernel: disk 1, o:1, dev:hdi
Jul 25 10:35:49 blackbox kernel: disk 2, o:0, dev:hdg
Jul 25 10:35:49 blackbox kernel: RAID5 conf printout:
Jul 25 10:35:49 blackbox kernel: --- rd:4 wd:2 fd:2
Jul 25 10:35:49 blackbox kernel: disk 0, o:1, dev:hdk
Jul 25 10:35:49 blackbox kernel: disk 1, o:1, dev:hdi
Jul 25 10:35:49 blackbox kernel: lost page write due to I/O error on md0
Well, now it seems I have to failed disks in my RAID-5, which of course
would be fatal. I am still hoping to somehow rescue the data on the
array somehow, but I am not sure what would be the best approach. I don't
want to cause any more damage.
When booting my system with all four disks connected, hde and hdg as
expected won't get added:
Jul 26 18:07:59 blackbox kernel: md: hdg has invalid sb, not importing!
Jul 26 18:07:59 blackbox kernel: md: autorun ...
Jul 26 18:07:59 blackbox kernel: md: considering hdi ...
Jul 26 18:07:59 blackbox kernel: md: adding hdi ...
Jul 26 18:07:59 blackbox kernel: md: adding hdk ...
Jul 26 18:07:59 blackbox kernel: md: adding hde ...
Jul 26 18:07:59 blackbox kernel: md: created md0
Jul 26 18:07:59 blackbox kernel: md: bind<hde>
Jul 26 18:07:59 blackbox kernel: md: bind<hdk>
Jul 26 18:07:59 blackbox kernel: md: bind<hdi>
Jul 26 18:07:59 blackbox kernel: md: running: <hdi><hdk><hde>
Jul 26 18:07:59 blackbox kernel: md: kicking non-fresh hde from array!
Jul 26 18:07:59 blackbox kernel: md: unbind<hde>
Jul 26 18:07:59 blackbox kernel: md: export_rdev(hde)
Jul 26 18:07:59 blackbox kernel: raid5: device hdi operational as raid disk 1
Jul 26 18:07:59 blackbox kernel: raid5: device hdk operational as raid disk 0
Jul 26 18:07:59 blackbox kernel: RAID5 conf printout:
Jul 26 18:07:59 blackbox kernel: --- rd:4 wd:2 fd:2
Jul 26 18:07:59 blackbox kernel: disk 0, o:1, dev:hdk
Jul 26 18:07:59 blackbox kernel: disk 1, o:1, dev:hdi
Jul 26 18:07:59 blackbox kernel: md: do_md_run() returned -22
Jul 26 18:07:59 blackbox kernel: md: md0 stopped.
Jul 26 18:07:59 blackbox kernel: md: unbind<hdi>
Jul 26 18:07:59 blackbox kernel: md: export_rdev(hdi)
Jul 26 18:07:59 blackbox kernel: md: unbind<hdk>
Jul 26 18:07:59 blackbox kernel: md: export_rdev(hdk)
Jul 26 18:07:59 blackbox kernel: md: ... autorun DONE.
So hde is not fresh (it has been removed from the array for quite some
time now) and hdg has an invalid superblock.
Any advice on what I should do now? Should I better try to rebuild the
array with hde or with hdg?
Greetings,
Frank
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