lvm.7 (2010 10)

lvm(7) lvm(7)

Create the volume group, vg01, containing the physical volume,

/dev/dsk/c0t0d0

, with the

vgcreate command.

vgcreate /dev/vg01 /dev/dsk/c0t0d0

You can view information about the newly created volume group with the

vgdisplay command.

vgdisplay -v /dev/vg01

Create a logical volume of size 100 MB, named

usrvol, on this volume group with the lvcreate com-

mand.

lvcreate -L 100 -n usrvol /dev/vg01

This creates two device ﬁles for the logical volume,

/dev/vg01/usrvol

, which is the block device ﬁle,

and

/dev/vg01/rusrvol

, which is the character (raw) device ﬁle.

You can view information about the newly created logical volume with the

lvdisplay command.

lvdisplay /dev/vg01/usrvol

Any operation allowed on a disk partition is allowed on the logical volume. Thus, you can use

usrvol to

hold a ﬁle system.

newfs /dev/vg01/rusrvol

mount /dev/vg01/usrvol /usr

To use a volume group version 2.0 or higher in the above example, only few changes are required.

The volume group directory and

group ﬁle are created automatically in all supported versions.

The

vgcreate command would be changed. The following creates the volume group with an extent size

of 32 megabytes and a maximum volume group size of 32 terabytes (see vgcreate (1M)).

vgcreate -V 2.0 -s 32 -S 32t /dev/vg01 /dev/dsk/c0t0d0

vgcreate -V 2.1 -s 32 -S 32t /dev/vg01 /dev/dsk/c0t0d0

vgcreate -V 2.2 -s 32 -S 32t /dev/vg01 /dev/dsk/c0t0d0

The following creates the volume group with an unshare unit of 512 KB.

vgcreate -V 2.2 -U 512 -s 32 -S 32t /dev/vg01 /dev/dsk/c0t0d0