HP-UX Logical Volume Manager and MirrorDisk/UX Release Notes HP-UX 11i v3 September 2009 (B.11.31) HP Part Number: 5900-0336 Published: September 2009 Edition: 5.
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Table of Contents Logical Volume Manager and MirrorDisk/UX Release Notes......................................5 About this Document..............................................................................................................................5 LVM and MirrorDisk/UX Overview.......................................................................................................5 Overview of Changes...................................................................................................
List of Tables 1 4 LVM Fixes in HP-UX 11i v3 September 2009..................................................................................
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 2009 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 the 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.
resynchronization is in progress. The forced flag stops the resynchronization, allowing the volume group to be deactivated. This feature works in normal activation mode (standalone) and exclusive mode activation in HP Serviceguard clusters. This new feature is supported for Version 1.0 and Version 2.x volume groups. For more information, see vgchange(1M).
Changed Features The following features have changed in the September 2009 release of LVM and MirrorDisk/UX: pvmove Enhancements The pvmove command supports the following new features for Version 2.0 and higher volume groups: • Online rebalancing Enables you to automatically rebalance the space for a single volume, a set of logical volumes, or all physical volumes belonging to the volume group.
Table 1 LVM Fixes in HP-UX 11i v3 September 2009 (continued) Defect ID 8 Description QXCR1000908270 The vgimport command displays an incorrect volume group version in the “Error: Unsupported volume group version. The command supports up to version X.Y” message when you invoke the command on a volume group with an unsupported volume group version. QXCR1000908273 The importation of avolume group with a mirrored logical volume is allowed on HP-UX 11i v3 even if MirrorDisk/UX is not installed.
Known Problems and Limitations No known problems were identified for this release of LVM and MirrorDisk/UX. Installation Requirements This section describes the installation requirements for this release. Required Hardware LVM and MirrorDisk/UX have no hardware requirements beyond the requirements of the HP-UX 11i v3 operating system. Both products run on all supported HP 9000 and HP Integrity servers.
VxVM 4.1 Commands Several VxVM 4.1 commands check whether a specified disk device is being used by LVM before overwriting it. For these commands to correctly check whether a device is part of a Version 2.x volume group, you must install the following patch: • PHCO_37836 Required Disk Space Because LVM is installed with the HP-UX 11i v3 operating environment, it consumes no additional disk space. MirrorDisk/UX consumes no additional disk space aside from a license key.
However, if you want backward-compatible PVLink behavior, you must use legacy device special files for physical volumes, and disable the mass storage stack multipathing for those physical volumes. To disable multipathing on legacy device special files, use the scsimgr command to configure a global device tunable called leg_mpath_enable.
Related Documentation The latest documentation for LVM is available in English at http://docs.hp.com in the HP-UX Operating Environment collection. Available documents include: • • • • • • • • • • • • HP-UX Logical Volume Manager and MirrorDisk/UX Release Notes (this version and previous versions) HP-UX System Administrator's Guide: Logical Volume Management (this document is localized) LVM 2.
*5900-0336* Printed in the US
