[linux-lvm] LVM breaks due to partion types when moving versions.

[Lance Reed <lreed@ruckusnetwork.com>]

Hey all,

I am in the process of moving a large NAS head running LVM volumes from 
a SUSE  PRO
9.1 to 9.3  setup.  This is normally easy as I just disconnect the 
storage arrays from one host
(Suse 9.1) to new host (9.3), and LVM sees the volumes on boot and does 
the right stuff.
Going from LVM lvm2-2.00.09-12 to lvm2-2.01.07-3.i586.rpm

Unfortunately, in this case, previous makers of pv's made them with non 
standard partition types.
So, there were functional partitions before with standard linux ID's 
working as LVM.
   Device Boot      Start         End      Blocks   Id  System
/dev/sdh1               1      136102  1093239283+  83  Linux

But they are not working with the new version of lvm.... 
lvm2-2.01.07-3.i586.rpm
(notice a lack of sdh1 in pvscan below)


so vgroup linking is broken

/tmp/lvm/backup # pvscan
  Couldn't find device with uuid 'bbrTkY-2HDP-2z2D-ehDB-8tnP-jI4b-xl6vHi'.
  Couldn't find device with uuid 'mrR810-I9mY-8hTP-tXak-RN6j-DUlY-zO5B3o'.
  Couldn't find device with uuid 'yaSDig-ATsH-oVtI-1lON-JM26-e7dG-plgUYM'.
  Couldn't find device with uuid 'NyRAN0-X1Wu-pCEI-LPnK-Bs3T-oWHR-tEjyCA'.
  Couldn't find device with uuid 'YLkutw-fjRA-03VU-vAx9-i8Et-HnuB-8iMbFK'.
  Couldn't find device with uuid 'bbrTkY-2HDP-2z2D-ehDB-8tnP-jI4b-xl6vHi'.
  Couldn't find device with uuid 'mrR810-I9mY-8hTP-tXak-RN6j-DUlY-zO5B3o'.
  Couldn't find device with uuid 'yaSDig-ATsH-oVtI-1lON-JM26-e7dG-plgUYM'.
  Couldn't find device with uuid 'NyRAN0-X1Wu-pCEI-LPnK-Bs3T-oWHR-tEjyCA'.
  Couldn't find device with uuid 'YLkutw-fjRA-03VU-vAx9-i8Et-HnuB-8iMbFK'.
  PV /dev/sdf         VG livestore2_copy_vg   lvm2 [1.02 TB / 155.00 GB 
free]
  PV /dev/sde         VG livestore2_copy_vg   lvm2 [1.02 TB / 5.00 GB free]
  PV /dev/sdd         VG livestore2_copy_vg   lvm2 [1.02 TB / 110.79 GB 
free]
  PV unknown device   VG devstore2_vg         lvm2 [1.02 TB / 0    free]
  PV unknown device   VG devstore2_vg         lvm2 [1.02 TB / 0    free]
  PV unknown device   VG devstore2_vg         lvm2 [1.02 TB / 0    free]
  PV unknown device   VG devstore2_vg         lvm2 [1.02 TB / 0    free]
  PV unknown device   VG devstore2_vg         lvm2 [1.02 TB / 0    free]
  PV /dev/sdb         VG devstore2_vg         lvm2 [1.02 TB / 0    free]
  PV /dev/sdc         VG devstore2_vg         lvm2 [1.02 TB / 715.17 GB 
free]
  Total: 10 [10.18 TB] / in use: 10 [10.18 TB] / in no VG: 0 [0   ]

# vgscan
  Reading all physical volumes.  This may take a while...
  Found volume group "livestore2_copy_vg" using metadata type lvm2
  Couldn't find device with uuid 'bbrTkY-2HDP-2z2D-ehDB-8tnP-jI4b-xl6vHi'.
  Couldn't find all physical volumes for volume group devstore2_vg.
  Couldn't find device with uuid 'bbrTkY-2HDP-2z2D-ehDB-8tnP-jI4b-xl6vHi'.
  Couldn't find all physical volumes for volume group devstore2_vg.
  Volume group "devstore2_vg" not found

But I do have backup copies of /etc/lvm.

So I was wondering if I could just use fdisk to set the partitions type 
to 8e, and LVM2 might work with it?

However, I thought LVM2 does not need 8e anymore, or did they change that?

I figure I can test by using sfdisk to backup the partition table, 
change it and see what happens.
Might have to use vgcfgrestore to put the pv metadata back in.

Anybody do this recently or have any ideas.

Thanks in advance!

Lance



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