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* [linux-lvm] pvcreate succeeds but vgcreate cannot read label
@ 2006-10-18 12:49 Malcolm Scott
  2006-10-18 14:04 ` Micha Holzmann
  2006-10-18 14:34 ` Alasdair G Kergon
  0 siblings, 2 replies; 6+ messages in thread
From: Malcolm Scott @ 2006-10-18 12:49 UTC (permalink / raw)
  To: linux-lvm

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

^ permalink raw reply	[flat|nested] 6+ messages in thread
* [linux-lvm] pvcreate succeeds but vgcreate cannot read label
@ 2006-10-18 12:01 Malcolm Scott
  2006-11-01 16:07 ` Alasdair G Kergon
  0 siblings, 1 reply; 6+ messages in thread
From: Malcolm Scott @ 2006-10-18 12:01 UTC (permalink / raw)
  To: linux-lvm

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

Please CC me on replies as I am not on this mailing list.

Many thanks.

-- 
Malcolm Scott
Research Associate, TINA project
University of Cambridge Computer Laboratory

^ permalink raw reply	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2006-11-01 16:07 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2006-10-18 12:49 [linux-lvm] pvcreate succeeds but vgcreate cannot read label Malcolm Scott
2006-10-18 14:04 ` Micha Holzmann
2006-10-18 14:07   ` Malcolm Scott
2006-10-18 14:34 ` Alasdair G Kergon
  -- strict thread matches above, loose matches on Subject: below --
2006-10-18 12:01 Malcolm Scott
2006-11-01 16:07 ` Alasdair G Kergon

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