HP-UX Logical Volume Manager and MirrorDisk/UX Release Notes (5900-2442, August 2012)

Logical Volume Manager and MirrorDisk/UX Release Notes
About this document
This document provides information about the Logical Volume Manager (LVM) and MirrorDisk/UX
products in the September 2012 release of HP-UX 11i v3.
LVM and MirrorDisk/UX overview
Logical Volume Manager (bundle BaseLVM) is the HP-UX default Volume Manager. It provides user
with flexibility in configuring and managing mass storage resources. In HP-UX 11i v3, the LVM
kernel and commands are bundled with the core HP-UX product.
MirrorDisk/UX (bundle B2491BA) is an optionally purchased HP-UX product to enable LVM
mirroring functionality.
Overview of changes
The initial HP-UX 11i v3 release of LVM and MirrorDisk/UX was integrated with the new mass
storage stack, delivering significant performance, scalability, availability, and usability
enhancements. LVM was enhanced to support larger logical volumes, temporary quiescing of
volume groups, and striping with mirroring. Volume group availability was improved: resizing a
LUN and modifying volume group characteristics no longer required the volume group to be
recreated, and replacing a disk could be done online.
This September 2012 release of LVM and MirrorDisk/UX provides defect fixes as described in
“Fixed issues in this version” (page 5). In addition, it provides an enhancement to detect Oracle
disks.
New and changed features in this release
pvcreate enhancement to detect Oracle Disks
Beginning with September 2012 release, the pvcreate command has been enhanced to detect
disk or disk partitions used by Oracle OCR or Vote in addition to ASM (Enhancement CR
QXCR1001176636). The pvcreate command will now fail with an appropriate message if the
input disk or disk partition contains a signature for any of the above known Oracle disk types.
4 Logical Volume Manager and MirrorDisk/UX Release Notes