RAID 1 issue
- From: hazzmat <hazzmat@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Thu, 15 Jun 2006 15:17:41 -0400
Many moons ago I created a raid 1 array for /home on an old PC that I had
given to someone to act as a router for their home network. The OS that I
had installed was Mandrake 10.1 and the array was created with raidtools
set of programs (mkraid). Recently I upgraded the OS to Mandriva 2006.0
since updates aren't issued for MDK 10.1 anymore--the system had chugged
along faithfully for over 500 days (!) on kernel 2.6.9 but it was well
past time to give it a fresh coat of paint. After the OS version upgrade
I notice an error message about the /dev/md0 array.:
devfs_mk_dev: could not append to parent for md/0
md: md0 stopped.
This, following on a heart-jolting message that I saw at the very end of
the upgrade installation (text only because of low RAM and weak VGA) about
there being no superblock for /dev/md0
However the bootup messages continue apparently indicating the
successful startup of the raid array. The array appears to be working.
# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 hda6[0] hdc1[1]
1784064 blocks [2/2] [UU]
unused devices: <none>
some tools report a problem:
# mdadm --query /dev/md0
/dev/md0: 1742.25MiB raid1 2 devices, 0 spares. Use mdadm --detail for more detail.
/dev/md0: No md super block found, not an md component.
but others seem to confirm the array is working and don't seem to find a
problem: # mdadm --detail /dev/md0
/dev/md0:
Version : 00.90.01
Creation Time : Tue Nov 16 20:39:53 2004
Raid Level : raid1
Array Size : 1784064 (1742.54 MiB 1826.88 MB)
Device Size : 1784064 (1742.54 MiB 1826.88 MB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Thu Jun 15 15:01:47 2006
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
UUID : 98216e37:047e638f:c173a5f5:32f4cac2
Events : 0.74990
Number Major Minor RaidDevice State
0 3 6 0 active sync /dev/hda6
1 22 1 1 active sync /dev/hdc1
*Is* there a problem? There hasn't been a crash so far. If there is a
problem can it be repaired without losing the data on the array?
Thanks for any insight and help.
--
Get Big Brother out of my email to reply.
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