LVM HOWTO
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9.6. Removing physical volumes from a volume group

Make sure that the physical volume isn't used by any logical volumes by using then 'pvdisplay' command: 


# pvdisplay /dev/hda1



--- Physical volume ---
PV Name               /dev/hda1
VG Name               myvg
PV Size               1.95 GB / NOT usable 4 MB [LVM: 122 KB]
PV#                   1
PV Status             available
Allocatable           yes (but full)
Cur LV                1
PE Size (KByte)       4096
Total PE              499
Free PE               0
Allocated PE          499
PV UUID               Sd44tK-9IRw-SrMC-MOkn-76iP-iftz-OVSen7

If the physical volume is still used you will have to migrate the data to another physical volume.

Then use 'vgreduce' to remove the physical volume: 


# vgreduce my_volume_group /dev/hda1

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