HP-UX Logical Volume Manager and MirrorDisk/UX Release Notes HP-UX 11i v3 March 2010 (B.11.31) HP Part Number: 5992-5191 Published: March 2010 Edition: 6.
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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 March 2010.........................................................................................
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 March 2010 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.
For more information, see lvm(7) and lvmove(1M). Bootable Version 2.2 and higher volume groups LVM now enables you to create bootable Version 2.2 and higher volume groups. LVM always provided the ability to create bootable Version 1.0 volume groups in the HP-UX 11i v1, 11i v2, and 11i v3 releases. Despite this new support, you cannot create bootable Version 2.0 and 2.1 volume groups. For more information, see lvlnboot(1M), lvm(7), and vgcreate(1M).
Table 1 LVM Fixes in HP-UX 11i v3 March 2010 (continued) Defect ID Description QXCR1000975928 In some instances, when using mirrored logical volumes, a pvmove auto rebalance fails with an error stating insufficient free space, even though enough free space is available for rebalance operation. QXCR1000982713 The vgcfgrestore command with the -o option fails on Version 2.x volume groups if the physical volume can no longer be accessed using the old device special file.
Problem: When the snapshot being deleted has one or more predecessors, and the operation requires data unsharing, the delete operation can hang under low memory conditions (This operation requires a minimum of 8 MB of memory). Severity: Critical Corrective Action: If the system hangs, stop other running applications so that enough memory is available for the lvremove to continue.
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. Required software Because LVM is installed with the HP-UX 11i v3 operating environment, there are no software requirements beyond the requirements of the HP-UX 11i v3 operating system.
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.
Sharing volume groups in an HP Serviceguard cluster To share a volume group in an HP Serviceguard cluster where the cluster nodes have different versions of the LVM product installed, use the following guidelines: • • • To share a version 2.1 volume group, you must install the HP-UX 11i v3 September 2008 release or above on all the cluster nodes. To share a 2.2 volume group, you must install the HP-UX 11i v3 March 2010 release or above on all the cluster nodes.
