LVM Volume Group Dynamic LUN Expansion (DLE) and Contraction (DLC) (September 2009)

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Abstract
The Logical Volume Manager (LVM) vgmodify command enables you to change attributes that
previously were set at creation time (for example, increasing the maximum number of physical
volumes or the maximum number of extents). It also enables you to resize disks either through
Dynamic LUN Expansion (DLE) or Dynamic LUN Contraction (DLC). The ability to resize disks is a
feature commonly provided by disk arrays. This paper explains the benefits of vgmodify and how to
use it.
The vgmodify command interface is available on HP-UX 11i v2 with the PHCO_35524 patch
(except –C, online DLC) and on 11i v3.