[linux-lvm] same LV UUID after vgmerge

[Magni Fabrizio]

Hello,
I recently tested vgmerge on a SLES9 trying to merge 12 volume groups
into a single one.

Everything seemed fine but the I discovered that in my /dev/mapper I had
the devices for the logical volumes only for the target volume group.

The other appear using lvscan and lvdisplay.

I tried to generate the missing devices with vgmknodes without luck.

Now the strange part: all the logical volumes have duplicated LV UUID.

Here is an example:

  --- Logical volume ---
  LV Name                /dev/oradata1_a/oraredo1_1_2
  VG Name                oradata1_a
  LV UUID                000000-0000-0000-0000-0000-0000-000001
  LV Write Access        read/write
  LV Status              available
  # open                 0
  LV Size                104.00 MB
  Current LE             26
  Segments               1
  Allocation             next free
  Read ahead sectors     120
  Block device           253:0

  --- Logical volume ---
  LV Name                /dev/oradata1_a/orablob102
  VG Name                oradata1_a
  LV UUID                000000-0000-0000-0000-0000-0000-000001
  LV Write Access        read/write
  LV Status              available
  # open                 0
  LV Size                3.91 GB
  Current LE             1001
  Segments               1
  Allocation             next free
  Read ahead sectors     120
  Block device           253:0

(volumes are 141 so I'm not pasting the complete result lvdiplay
output).

Any idea how to solve this issue?

Thanks
Fabrizio