LVM Version 2.0 Volume Groups in HP-UX 11i v3 (September 2008)

There is another difference in lvdisplay(1M).

For 1.0 volume groups, the order in which the physical extents are displayed by lvdisplay –v can change across

activation cycles. This is because when a 1.0 volume group is activated, LVM arranges the physical extents of a

logical extent (LE) in order of increasing physical volume number.

For example, the display:

--- Logical extents ---

LE PV1 PE1 Status 1 PV2 PE2 Status 2

000000003 /dev/disk/disk79 00000003 current /dev/disk/disk80 00000014 current

might change to:

--- Logical extents ---

LE PV1 PE1 Status 1 PV2 PE2 Status 2

000000003 /dev/disk/disk80 00000014 current /dev/disk/disk79 00000003 current

after deactivation and activation again.

For 2.x volume groups, the order in the display does not change across activation.

LVM Device Special Files

With volume group version 2.x, LVM device special files have changed. For version 1.0 volume groups,

procedures do not need to change. For 2.x version volume groups, there are a few differences shown in the

following figures.

• Device special files for Version 1.0 volume groups are unchanged

• Device special files for Version 2.x volume groups have a new major number (128)

• Device special files for Version 2.x volume groups have a different minor number encoding scheme