When I run pvcreate on a partition, it seems the PV label is successfully
written to the partition, but vgcreate cannot then read this label in order
to incorporate this new PV into a new VG.
mas90@neptune ~ $ sudo pvcreate /dev/hda6
Physical volume "/dev/hda6" successfully created
mas90@neptune ~ $ sudo vgcreate neptune_vg /dev/hda6
No physical volume label read from /dev/hda6
/dev/hda6 not identified as an existing physical volume
Unable to add physical volume '/dev/hda6' to volume group 'neptune_vg'.
mas90@neptune ~ $ sudo dd if=/dev/hda6 bs=1k count=1 | hexdump -c
1+0 records in
1+0 records out
0000000 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
*
0000200 L A B E L O N E 001 \0 \0 \0 \0 \0 \0 \0
0000210 # - 335 } \0 \0 \0 L V M 2 0 0 1
0000220 h 2 W 4 r k w f t N B j s h W f
0000230 M r s a E O f q 3 M U J S Z w z
0000240 \0 n ) 342 004 \0 \0 \0 \0 \0 003 \0 \0 \0 \0 \0
0000250 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
0000260 \0 \0 \0 \0 \0 \0 \0 \0 \0 020 \0 \0 \0 \0 \0 \0
0000270 \0 360 002 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
0000280 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
*
0000400
1024 bytes (1.0 kB) copied, 0.009396 seconds, 109 kB/s
What could cause this?
The system is running Ubuntu Edgy, with the following versions:
mas90@neptune ~ $ sudo lvm version
LVM version: 2.02.06 (2006-05-12)
Library version: 1.02.07 (2006-05-11)
Driver version: 4.6.0
mas90@neptune ~ $ uname -a
Linux neptune 2.6.17-10-generic #2 SMP Tue Oct 10 19:45:28 UTC 2006 i686
GNU/Linux
Many thanks.
--
Malcolm Scott
Research Associate, TINA project
University of Cambridge Computer Laboratory
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