On Fri, Jul 13, 2007 at 05:48:43PM +0100, David Laight wrote:
>On Fri, Jul 13, 2007 at 12:39:30PM -0400, George Georgalis wrote:
>> 
>> my plan is to change the RAID partition to UNKNOWN
>> boot into wd0; change back the in-core label for
>> wd1a to RAID, backup the raid0a partition to raid0i;
>> repartition so the raid0a has an offset of 0, newfs
>> it, and restore root partition from raid0i.
>
>You might manage to move the raid header and raid disklabel 63 sectors
>down the disk image!
>There isn't very much information in the 64 sector raid header.
>
>Alternatively rebuild bootxx_ffsv1 with a different value for the
>'magic offset' to the raid root filesystem.

both cases, too much I don't know about... :\

Unfortunately the way I planned has a snare,
below I've booted into wd0 and changed back the
type of wd1a to RAID, but...

 root@rock:/root mount
/dev/wd0a on / type ffs (soft dependencies, local)
/dev/wd0f on /var type ffs (nodev, noatime, soft dependencies, local)
/dev/wd0e on /usr type ffs (nodev, soft dependencies, local)
/dev/wd0g on /local type ffs (soft dependencies, local)
mfs:375 on /tmp type mfs (synchronous, local)
kernfs on /kern type kernfs (local)
procfs on /proc type procfs (local)
 root@rock:/root disklabel  raid0 
disklabel: Can't read master boot record 0: Device not configured
disklabel: ioctl DIOCGDINFO: Device not configured
 root@rock:/root mount /dev/raid0i /mnt
mount: cannot open `/dev/raid0i': Device not configured

so I'm going to give it (backup root partition)
another shot in single user, then see if I can
repartition/restore; fail that, just rebuild restore
all, without the extra offset. Maybe can finish the
restore by Monday.

// George


-- 
George Georgalis, information systems scientist <IXOYE><