rebuilding raided root partition
Hi Folks,
I've been busily recovering from a bad crash (strangely enough, a single
disk drive failure that brought down an entire raided environment, with
spares).
I've pretty much recovered and rebuilt everything, EXCEPT....
my root partition is raided, and is now running only on its single spare
drive:
-----
server1:~# more /proc/mdstat
md2 : inactive sdd3[0] sdb3[2]
195318016 blocks
server1:~# mdadm --detail /dev/md2 [details omitted]
/dev/md2:
Raid Level : raid1
Device Size : 97659008 (93.13 GiB 100.00 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 2
Persistence : Superblock is persistent
State : active, degraded
Active Devices : 0
Working Devices : 2
Failed Devices : 0
Spare Devices : 2
Number Major Minor RaidDevice State
0 8 51 0 spare rebuilding /dev/sdd3
1 0 0 - removed
2 8 19 - spare /dev/sdb3
------
note the line "spare rebuilding" - that's the result of: mdadm --add
/dev/md2 /dev/sdd3
unfortunately, it doesn't seem to really be doing anything - it's been
saying "rebuilding" for several hours
now for another mirror device, doing an mdadm --add, kicked off a resync
(as indicated by cat /proc/mdstat) that concluded just fine with a
rebuilt mirror array
but for this array, it just shows "active, degraged, and rebuilding" in
mdadm --detail, and "inactive" in /proc/mdstat
about the only difference I can see, is that the array that rebuilt
started with one primary drive, to which I added a 2nd drive, and then a
spare; the one that's hanging is running on a spare, and it thinks I'm
adding another spare (note: both serve as physical volumes underlying LVM)
so..... on to questions:
1. What's going on?
2. Any suggestions on how to reassemble the array? mdadm --assemble
/dev/md2 tells me I need to deactivate the device, but then, it's my /
volume - which leaves me a little stumped
Thanks very much,
Miles Fidelman
--
In theory, there is no difference between theory and practice.
In practice, there is. .... Yogi Berra
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