[linux-lvm] lvm1 to lvm2 upgrade failed: confused on pv between sda1 and md5

[Marc MERLIN]

The VG is seen, but not the one LV in there

kernel: 2.6.14
  LVM version:     2.01.04 (2005-02-09)
  Library version: 1.01.00-ioctl (2005-01-17)
  Driver version:  4.4.0

My PV for /dev/dshelf3 is /dev/md5
The VG is found, but not the LV within it, apparently because LVM
selects /dev/sda1 instead of /dev/md5.

Sure enough, that drive is part of the raid set:
gargamel:~# cat /proc/mdstat | grep sda1
md5 : active raid5 sdg1[6] sdf1[5] sde1[4] sdd1[3] sdc1[2] sdb1[1] sda1[0]

vgdisplay -vv (abbridged) gives:
      /dev/sda1: lvm1 label detected
      /dev/md2: lvm1 label detected
      /dev/md4: lvm2 label detected
      /dev/md5: lvm1 label detected
      Duplicate PV 9O6xt9OyES075HwBQHdtmGRb7vD4EOy8 on /dev/sda1 - using md /dev/md5
      /dev/sdt1: lvm2 label detected
      Ignoring duplicate PV ROSSavso6qtpjO7fw93bO7cMntbJ09xz on /dev/sdt1 - using md /dev/md4
      /dev/sdh3: lvm1 label detected
      Ignoring duplicate PV LpvPCRIdjGlQuX4FCWWArPhv7Vv3Cv08 on /dev/sdh3 - using md /dev/md2
      /dev/sdl3: lvm1 label detected
      Ignoring duplicate PV LpvPCRIdjGlQuX4FCWWArPhv7Vv3Cv08 on /dev/sdl3 - using md /dev/md2

      Found /dev/sda1 in VG dshelf3
      Unlocking /var/lock/lvm/V_dshelf3
  --- Volume group ---
  VG Name               dshelf3
  System ID             gargamel.svh.merlins.org1013790828
  Format                lvm1
  VG Access             read/write
  VG Status             resizable
  MAX LV                255
  Cur LV                0
  Open LV               0
  Max PV                255
  Cur PV                1
  Act PV                1
  VG Size               410.06 GB
  PE Size               64.00 MB
  Total PE              6561
  Alloc PE / Size       6400 / 400.00 GB
  Free  PE / Size       161 / 10.06 GB
  VG UUID               6j8wL4-3n1y-WHL3-HM61-IyuS-6vJW-pubTQo
   
  --- Physical volumes ---
  PV Name               /dev/sda1     
  PV UUID               9O6xt9-OyES-075H-wBQH-dtmG-Rb7v-D4EOy8
  PV Status             allocatable
  Total PE / Free PE    6561 / 161

gargamel:~# vgchange -a y dshelf3
  0 logical volume(s) in volume group "dshelf3" now active

Can I help LVM2 find the LV in there somehow?

BTW, note that LVM2 did say "using md /dev/md5 (instead of /dev/sda1) and 
still showed /dev/sda1 as a PV for dshelf3 instead

Thanks
Marc
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