mdadm raid1
I had a problem w/ my system crashing and I noticed there was an
I/O error to /dev/hda. In a fit of panic, I swapped the IDE cable
of /dev/hda and /dev/hdc and reboot. Come to find out, my CPU fan
was dying causing the CPU not to work.
Anyway ...
Upon putting the drives back where they belong, I notice that /dev/hda
is kicked out of the raid1 array as faulty. Reading the kern.log,
it looks like this is occuring b/c of a superblock update time inconsistency.
How can I correct this so that both /dev/hda and /dev/hdc are in
the array /dev/md0?
Nov 29 20:25:37 trader kernel: md: md driver 0.90.0 MAX_MD_DEVS=256,
MD_SB_DISKS=27
Nov 29 20:25:37 trader kernel: md: raid1 personality registered as nr 3
Nov 29 20:25:37 trader kernel: [events: 00000034]
Nov 29 20:25:37 trader kernel: [events: 00000039]
Nov 29 20:25:37 trader kernel: md: autorun ...
Nov 29 20:25:37 trader kernel: md: considering hdc ...
Nov 29 20:25:37 trader kernel: md: adding hdc ...
Nov 29 20:25:37 trader kernel: md: adding hda ...
Nov 29 20:25:37 trader kernel: md: created md0
Nov 29 20:25:37 trader kernel: md: bind<hda,1>
Nov 29 20:25:37 trader kernel: md: bind<hdc,2>
Nov 29 20:25:37 trader kernel: md: running: <hdc><hda>
Nov 29 20:25:37 trader kernel: md: hdc's event counter: 00000039
Nov 29 20:25:37 trader kernel: md: hda's event counter: 00000034
Nov 29 20:25:37 trader kernel: md: superblock update time inconsistency
-- using the most recent one
Nov 29 20:25:37 trader kernel: md: freshest: hdc
Nov 29 20:25:37 trader kernel: md: kicking non-fresh hda from array!
Nov 29 20:25:37 trader kernel: md: unbind<hda,1>
Nov 29 20:25:37 trader kernel: md: export_rdev(hda)
Nov 29 20:25:37 trader kernel: md: md0: raid array is not clean -
- starting background reconstruction
Nov 29 20:25:37 trader kernel: md: RAID level 1 does not need chunksize!
Continuing anyway.
Nov 29 20:25:37 trader kernel: md0: max total readahead window set
to 124k
Nov 29 20:25:37 trader kernel: md0: 1 data-disks, max readahead per
data-disk: 124k
Nov 29 20:25:37 trader kernel: raid1: device hdc operational as mirror 1
Nov 29 20:25:37 trader kernel: raid1: md0, not all disks are operational
-- trying to recover array
Nov 29 20:25:37 trader kernel: raid1: raid set md0 active with 1
out of 2 mirrors
Nov 29 20:25:37 trader kernel: md: updating md0 RAID superblock on
device
Nov 29 20:25:37 trader kernel: md: hdc [events: 0000003a]<6>(write)
hdc's sb offset: 40146560
Nov 29 20:25:37 trader kernel: md: recovery thread got woken up ...
Nov 29 20:25:37 trader kernel: md0: no spare disk to reconstruct
array! -- continuing in degraded mode
Nov 29 20:25:37 trader kernel: md: recovery thread finished ...
Nov 29 20:25:37 trader kernel: md: ... autorun DONE.
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