[root@foo ~]# pvcreate --test /dev/hda4
  Test mode: Metadata will NOT be updated.
  Wiping software RAID md superblock on /dev/hda4
  Physical volume "/dev/hda4" successfully created
[root@foo ~]# pvs
  Incorrect metadata area header checksum
  Incorrect metadata area header checksum
  Incorrect metadata area header checksum
  PV         VG   Fmt  Attr PSize   PFree
  /dev/hda4       lvm2 --   218.15G 218.15G
[root@foo ~]# pvs
  PV         VG         Fmt  Attr PSize   PFree
  /dev/hdb2  VolGroup00 lvm2 a-   186.19G 32.00M
[root@foo ~]# pvcreate --test /dev/hda4
  Test mode: Metadata will NOT be updated.
  Wiping software RAID md superblock on /dev/hda4
  Physical volume "/dev/hda4" successfully created
[root@foo ~]# pvscan
  PV /dev/hdb2   VG VolGroup00   lvm2 [186.19 GB / 32.00 MB free]
  Total: 1 [186.19 GB] / in use: 1 [186.19 GB] / in no VG: 0 [0   ]
[root@foo ~]# pvs
  PV         VG         Fmt  Attr PSize   PFree
  /dev/hdb2  VolGroup00 lvm2 a-   186.19G 32.00M
[root@foo ~]# pvcreate --test /dev/hda4
  Test mode: Metadata will NOT be updated.
  Wiping software RAID md superblock on /dev/hda4
  Physical volume "/dev/hda4" successfully created
[root@foo ~]# pvscan
  PV /dev/hdb2   VG VolGroup00   lvm2 [186.19 GB / 32.00 MB free]
  Total: 1 [186.19 GB] / in use: 1 [186.19 GB] / in no VG: 0 [0   ]
[root@foo ~]# pvs
  PV         VG         Fmt  Attr PSize   PFree
  /dev/hdb2  VolGroup00 lvm2 a-   186.19G 32.00M
[root@foo ~]# pvscan
  PV /dev/hdb2   VG VolGroup00   lvm2 [186.19 GB / 32.00 MB free]
  Total: 1 [186.19 GB] / in use: 1 [186.19 GB] / in no VG: 0 [0   ]
[root@foo ~]#