vgextend.1m (2010 09)

vgextend(1M) vgextend(1M)

When a node wants to share the volume group, the user must ﬁrst execute a

vgimport if physical

volumes were added at the time the volume group was not activated on that node.

LVM shared mode is currently only available in Serviceguard clusters.

EXTERNAL INFLUENCES

Environment Variables

LANG determines the language in which messages are displayed.

LANG is not speciﬁed or is null, it defaults to "C" (see lang (5)).

If any internationalization variable contains an invalid setting, all internationalization variables default

to "C" (see environ (5)).

EXAMPLES

Add physical volumes

/dev/dsk/c0t1d0

and /dev/dsk/c0t2d0

to volume group /dev/vg03:

vgextend /dev/vg03 /dev/dsk/c0t1d0 /dev/dsk/c0t2d0

Extend physical volume group PVG0 while adding physical volumes

/dev/dsk/c0t3d0 and

/dev/dsk/c0t4d0

to volume group /dev/vg03:

vgextend -g PVG0 /dev/vg03 /dev/dsk/c0t3d0 /dev/dsk/c0t4d0

Add an alternate link to one of the physical volumes in the volume group where /dev/dsk/c0t4d0

and /dev/dsk/c1t4d0 refer to the same physical volume (referenced via different controllers), and the

volume group already contains

/dev/dsk/c0t4d0

. /dev/dsk/c0t4d0 remains the primary link (in

use) and

/dev/dsk/c1t4d0

becomes the alternate link.

vgextend /dev/vg03 /dev/dsk/c1t4d0

Add a spare physical volume to a volume group:

vgextend -z y /dev/vg03 /dev/dsk/c2t4d0

WARNINGS

The new physical volume which has been added to the volume group could potentially have a different

block size compared to physical volumes already in the volume group.

If a logical volume is created on two or more physical volumes which have a different block size, it is not

possible to use such logical volume for ﬁle system purposes (see extendfs (1M)).

For example, when a logical volume contains physical volumes that all have 1k block size, and then it is

extended to contain a physical volume with 2k block size, then the block size of the volume group is

increased to 2k.