Re: unknown partition table

[Philippe Troin <phil@fifi.org>]

Sven Lankes <sl@megabit.net> writes:

> On Mon, Oct 28, 2002 at 01:14:22AM -0500, Ben Collins wrote:
> 
> >>> Device Flag    Start       End    Blocks   Id  System
> >>> /dev/sdb1             0      2733   2077080   fd  Linux raid autodetect
> >>> /dev/sdb3             0      2733   2077080    5  Whole disk
> >> Change that to be:
> >> /dev/sdb1             1      2733   ???????   fd  Linux raid autodetect
> >> /dev/sdb3             0      2733   2077080    5  Whole disk
> >> The partition table lies in the first sector.
> 
> Ok - that helped. The raid arrays work now.

Glad to hear that.
 
> > And any self-respecting filesystem doesn't touch the first sector of the
> > partition for that very reason. Unless Linux raid autodetect partitions
> > are broken.

Actually, I've checked and I can confirm that LVM obliterates the
first sector when one pvcreates a volume. It probably stores a
signature (LVM UUID, etc...) there.

Phil.