I have just converted (read - reinstalled) an Amanda server box from
sarge (pre stable) to Ubuntu hoary (why not just just update the box? -
simply trying to cut down on the number of Linux variants running in
the one place) and all is cool and froody with the exception of the
600GB RAID5 array which is used for the actual backups. The data,
touching large chunks of trees, is fine, but mdadm, or the md layer,
seems a tad confused. There is ONE RAID array in the box yet cat
/proc/mdstat shows me this
Personalities : [raid5]
md1 : active raid5 hdf[0] hdh[2] hdg[1]
597445440 blocks level 5, 64k chunk, algorithm 2 [4/3] [UUU_]
md0 : active raid5 hde1[0] hdh1[3] hdg1[2] hdf1[1]
597376512 blocks level 5, 128k chunk, algorithm 2 [4/4] [UUUU]
unused devices: <none>
fdisk -l shows me the four component physical disks, each of which is
one big partition, and then shows me this:
Disk /dev/md0: 611.7 GB, 611713548288 bytes
2 heads, 4 sectors/track, 149344128 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Disk /dev/md0 doesn't contain a valid partition table
Disk /dev/md1: 611.7 GB, 611784130560 bytes
255 heads, 63 sectors/track, 74378 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/md1p1 1 24790 199125643+ fd Linux raid
autodetect
What I am used to seeing is /dev/md0, with no partition table i.e. the
filesystem created on the RAID device. I have no idea what the system
thinks md1 is (well, I know what it thinks it is, but I'd don't know
where it got the idea) and WTF is /dev/md1p1 - there is no such device
file.
ps -ef|grep md shows me, inter alia,
root 2603 1 7 00:14 ? 00:46:51 [md0_raid5]
root 2641 1 0 00:14 ? 00:00:00 [md1_raid5]
and I guess md1_raid5 shouldn't be there, though I'm reluctant to
simply kill it.
I suspect I could fix this by creating an mdadm config file, but mdadm
should work quite happily without a config file.
Ideas?
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