On Thursday October 30, hvisage@envisage.co.za wrote:
> On Thu, Oct 30, 2003 at 12:18:44PM +1100, Neil Brown wrote:
> >
> > Show me:
> > - your current mdadm.conf
> > - the output of mdadm -Es -c partitions
> > - the output of mdadm -Ds
> > - the output of mdadm -Asv
> >
> > And I'll try to tell you.
>
> root@hvstress ~ # mdadm -Es -c partitions
..etc...
Thanks.
So you have to raid arrays:
md0 is raid0 from 2 scsi partitions and has
UUID=832ab839:9920da12:97991965:f9af96e2
md1 is linear from another scsi partitions and md0, and has
UUID=4478ef04:f7b90666:6a122182:c6b44cf4
So you want mdadm to scan all SCSI partitions and md0, and
to assemble md0 first, then md1. Identifying partitions
by UUID is easiest so:
DEVICE /dev/sd* /dev/md0
ARRAY /dev/md0 UUID=832ab839:9920da12:97991965:f9af96e2
ARRAY /dev/md1 UUID=4478ef04:f7b90666:6a122182:c6b44cf4
should do it. Having "level=xxx" and "num-devices=2" doesn't hurt,
but isn't necessary.
> root@hvstress ~ # cat /etc/mdadm.conf
> DEVICE /dev/md/* /dev/sd[a-z] partitions /dev/md*
>
> ARRAY /dev/md/0 level=raid0 num-devices=2 UUID=832ab839:9920da12:97991965:f9af96
> e2
> devices=/dev/scsi/host0/bus0/target1/lun0/part1,/dev/scsi/host0/bus0/target2/
> lun0/part1
> ARRAY /dev/md/1 level=linear num-devices=2 UUID=c2a91233:5ffd5398:eac27773:e1294
> 5dd
> devices=/dev/md/0,/dev/scsi/host0/bus0/target1/lun0/part2
I suspect the reason that this didn't work was the devices= lines.
The "/dev/scsi/..." doesn't match (as a string) any of the devices
listed in the DEVICE line. It is fairly rare that you would need to
want "devices=" entries in mdadm.conf
NeilBrown
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