Hi,
Can anyone suggest a solution to this seemingly simple problem, apart from
labotomising myself :o) ?
I had hdaX and hdbX devices mirrored under raidtools 0.9.
I moved the hdb disk physically to hdc and it was no longer recognised as hda's
counterpart. My raid array thus runs in degraded mode. It does not allow me to go back
to hdb either.
Instead I tried binary copying hda to hdc and looking for the raid command to force
hdcX's into the arrays as second devices.
I remember being able to do this under a previous version but
cannot seem to do it under 0.9. Indeed the manpage on mkraid
states that initialising a device destroys the data.
I tried changing /etc/raidtab for one of the arrays:
raiddev /dev/md6
raid-level 1
nr-raid-disks 2
chunk-size 64k
persistent-superblock 1
device /dev/null
raid-disk 0
device /dev/hdc11
raid-disk 1
...then ran mkraid --really-force /dev/md6.
Mkraid complained about /dev/null.
Next I went down to one device with 'raid-disk 1' and it
complained, so I made it raid-disk 0. This of course worked but I didn't want the
superblock recording itself as the principal disk.
There seemed to be rebuild activity at this point despite the fact that the array was
composed of only one disk.
What I do not want to do now is bring the machine back up with
hda11 and hdc11 both claiming to be the main device and have hda11 rebuilt with
non-existent data from hdc11 !!
Does anyone know a way round this?
I imagined adding a fresh/spare disk to a mirroring group (even if running in degraded
mode) would be a very basic task!
Surely I don't have to recreate a new empty 2-device array and fill it with the data
from hda11?
Any words of wisdom welcome...
Thanks
Chris Q.
