For the past 4-5 weeks I have had a successfully running raid0
array on 2 4gb scsi disks.
Today, I took the system down to install a new tape drive so that
I could do backups on said raid0 array.
To make a long sad story short, the array insists on thinking its
a raid1 array, and not a raid0 array. I am **POSITIVE** that it was
configured as a raid0 array, as it had about 6gb of data on it out of teh
total 8gb available (2x4gb drives).
Here is my /etc/raidtab
root@excel linux]# more /etc/raidtab
raiddev /dev/md0
# General parameters
raid-level 0
nr-raid-disks 2
chunk-size 1024
# RAID disks
device /dev/sdb1
raid-disk 0
device /dev/sdc1
raid-disk 1
This system had been rebooted 2-3 times since I had
installed the raid0 array.
When I execute a 'raidstart /dev/md0', here is what
/var/log/messages tells me;
May 14 15:17:28 excel kernel: (read) sdb1's sb offset: 4192832
[events: 00000079]
May 14 15:17:28 excel kernel: autorun ...
May 14 15:17:28 excel kernel: considering sdb1 ...
May 14 15:17:28 excel kernel: adding sdb1 ...
May 14 15:17:28 excel kernel: created md0
May 14 15:17:28 excel kernel: bind<sdb1,1>
May 14 15:17:28 excel kernel: running: <sdb1>
May 14 15:17:28 excel kernel: now!
May 14 15:17:28 excel kernel: sdb1's event counter: 00000079
May 14 15:17:28 excel kernel: md0: max total readahead window set to 128k
May 14 15:17:28 excel kernel: md0: 1 data-disks, max readahead per
data-disk: 128k
May 14 15:17:28 excel kernel: raid1: device sdb1 operational as mirror 0
May 14 15:17:28 excel kernel: raid1: md0, not all disks are operational --
trying to recover array
May 14 15:17:28 excel kernel: raid1: raid set md0 active with 1 out of 2
mirrors
May 14 15:17:28 excel kernel: md: updating md0 RAID superblock on device
May 14 15:17:28 excel kernel: sdb1 [events: 0000007a](write) sdb1's sb
offset: 4192832
May 14 15:17:28 excel kernel: md: recovery thread got woken up ...
May 14 15:17:28 excel kernel: md0: no spare disk to reconstruct array! --
continuing in degraded mode
May 14 15:17:28 excel kernel: md: recovery thread finished ...
May 14 15:17:29 excel kernel: .
May 14 15:17:29 excel kernel: ... autorun DONE.
What the heck I am gonna do with this???????? I sure hope I have
not lost teh data that was on my raid0 array..
Chris
