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[linux-lvm] lvm2 migration issue



I'm trying to upgrade one of my Fedora Core 1 boxes to FC2, which has
the root filesystem on LVM.  The installer won't allow me to ugprade
because, it seems, vgscan is returning an error.

The output of "lvm vgscan -v -d" from a VC whilst running the installer
is:

  1 PV(s) found for VG mainvg: expected 2
  Volume group "mainvg" not found
    Wiping cache of LVM-capable devices
    Wiping internal cache
  Reading all physical volumes.  This may take a while...
    Finding all volume groups
    Finding volume group "mainvg"

"lvm pvscan" gives:

  1 PV(s) found for VG mainvg: expected 2
  Logical volume (usrvol) contains an incomplete mapping table.
    Wiping cache of LVM-capable devices
    Wiping internal cache
    Walking through all physical volumes
  PV /dev/hda7   VG mainvg   lvm1 [19.82 GB / 0    free]
  Total: 1 [19.82 GB] / in use: 1 [19.82 GB] / in no VG: 0 [0   ]

so it doesn't recognise /dev/hda2 as a PV, for some reason.

When booted into FC1, /proc/lvm/global has:

LVM module LVM version 1.0.5+(22/07/2002)

Total:  1 VG  2 PVs  2 LVs (1 LV open 1 times)

Global: 105960 bytes malloced   IOP version: 10   0:30:18 active

VG:  mainvg  [2 PV, 2 LV/1 open]  PE Size: 4096 KB
  Usage [KB/PE]: 25907200 /6325 total  25907200 /6325 used  0 /0 free
  PVs: [AA] hda2                   5120000 /1250     5120000 /1250           0 /0     
       [AA] hda7                  20787200 /5075    20787200 /5075           0 /0     
    LVs: [AWDL  ] usrvol                     5120000 /1250     1x open
         [AWDL  ] storevol                  20787200 /5075     close

and back booted into the FC2 installer, 

# lvm pvdisplay  /dev/hda2
  Failed to read physical volume "/dev/hda2"

Any ideas how I can get round this?

Regards,

joe

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