reducevg command
Purpose
Removes physical volumes from a volume group. When all physical volumes are removed from the volume group, the volume group is deleted.
Description
The reducevg command removes one or more physical volumes represented by the PhysicalVolume parameter from the VolumeGroup. When you remove all physical volumes in a volume group, the volume group is also removed.
Note:
- Sometimes a disk is removed from the system without first running the reducevg command. The VGDA still has this removed disk in its memory, but the PhysicalVolume name no longer exists or has been reassigned. To remove references to this missing disk you can still use reducevg, but with the Physical Volume ID (PVID) instead of the disk name: reducevg VolumeGroup PVID.
- The specified physical volume cannot contain a logical volume that is assigned to a shared memory pool (to be used as a paging space device by a shared memory partition).
Flags
| Flag name | Description |
|---|---|
| -f | Removes the requirement for user confirmation when the -rmlv flag is used. |
| -rmlv | Deallocates the existing logical volume partitions
and then deletes resultant empty logical volumes from the specified
physical volumes. User confirmation is required unless the -f flag
is added. Attention: The reducevg command with
the -rmlv flag automatically deletes all logical volume data
on the physical volume before removing the physical volume from the
volume group. If a logical volume spans multiple physical volumes,
the removal of any of those physical volumes may jeopardize the integrity
of the entire logical volume.
|
Exit Status
Examples
- To remove physical volume hdisk1 from volume group vg01,
type:
reducevg vg01 hdisk1 - To remove physical volume hdisk1 and all residing logical
volumes from volume group vg01 without user confirmation,
type: Attention: The reducevg command with the -rmlv flag automatically deletes all logical volume data before removing the physical volume.
The physical volume hdisk1 and all residing logical volumes are removed.reducevg -rmlv -f vg01 hdisk1
