HP-UX Logical Volume Manager and MirrorDisk/UX Release Notes HP-UX 11i v3 March 2011 and March 2011 Web Release (B.11.31) HP Part Number: 5900-1267 Published: March 2011 Edition: 8.
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Contents Logical Volume Manager and MirrorDisk/UX Release Notes...............................4 About this document.................................................................................................................4 LVM and MirrorDisk/UX overview...............................................................................................4 Overview of changes...........................................................................................................
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 2011 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.
Table 1 LVM Fixes in HP-UX 11i v3 March 2011 Release (continued) Defect ID QXCR10010397211 Description In a configuration where large numbers of I/O are in progress for many logical volumes and automatic increase of pre-allocated extents for a space-efficient snapshot is enabled, the following message is logged in syslog: lvmpud->lvextend[25174]: "LogicalExtentsNumber" is not bigger than current setting.
Table 1 LVM Fixes in HP-UX 11i v3 March 2011 Release (continued) Defect ID Description QXCR10010499131 If automatic increase of pre-allocated extents is enabled for a space-efficient, distributed snapshot, the pre-allocated extents are increased for each unsharing IO. QXCR10010508221 During IOs on a source logical volume, the system panics.
Table 1 LVM Fixes in HP-UX 11i v3 March 2011 Release (continued) Defect ID Description QXCR1001065169 Resync of stale extents on a striped and mirrored snapshot logical volume fails with 'I/O error'. This behavior is seen only on HP-UX 11iv3 September 2010 updates and onwards. QXCR1001066034 In PA RISC systems, vgdisplay core dumps while any volume group is quiesced and when the LANG variable is set to 'C' Locale.
Table 1 LVM Fixes in HP-UX 11i v3 March 2011 Release (continued) Defect ID Description QXCR1001077418 While activating a Version 2.2 volume group, the original logical volume of the distributed space-efficient snapshot becomes unavailable if the physical volume associated with this space-efficient snapshot is in a unavailable state. QXCR1001077961 A crash dump is not generated if the system crashes when it is booted in maintenance mode (MMB), using hpux -lm, on a boot disk belonging to a Version 2.
Problem: pvdisplay -v will take a long time to complete if the physical volume has large number of physical extents in use (about 0.5 million extents or more). Severity: Serious Corrective Action: Restrict the use of the –v option when the physical volume has more than 0.5 million physical extents in use. Panic in lvmp_vg_lvix_to_minor(k) after removing a disk from the volume group Defect ID: QXCR1001095451 Problem: The system panics with the following stack trace.
Limitations This section provides a list of limitations as known to HP at time of publication. • Logical volumes that have snapshots associated with them might experience an increase in latencies associated with writes. This is also applicable for writes on (writable) snapshots themselves.
mkfs and mkboot commands The mkfs and mkboot commands check whether a specified disk device is being used by LVM; if so, they display an error message. For these commands to correctly check whether a device is part of a Version 2.x volume group, you must install the following patches: • PHCO_37328 • PHCO_37340 • PHCO_37394 These patches are delivered in the FEATURE11i bundle. HP Serviceguard To support Version 2.0 volume groups, HP Serviceguard 11.18 requires the April 2008 patch.
environments, plus selected non-HP servers that have a support obligation with HP. It is integrated with HP Systems Insight Manager. A dedicated server is recommended to host both HP Systems Insight Manager and HP Insight Remote Support Advanced. Go to http://www.hp.com/go/insightremotesupport for details on both versions. To download the software, go to Software Depot: http://hp.com/go/softwaredepot Select Insight Remote Support from the menu on the right. Compatibility issues Version 2.
# scsimgr save_attr -a leg_mpath_enable=false Note that this has no effect on multipathing through persistent device special files. For more information, see scsimgr(1M). Moving volume groups from HP-UX 11i v3 to previous HP-UX releases If a volume group used on HP-UX 11i v3 is accessed from a system running a previous release of HP-UX 11i, you might encounter these compatibility issues: • Version 2.x volume groups: As noted in “Version 2.x volume groups” (page 12), Version 2.
NOTE: MORE does not operate in a cluster with both HP-UX 11i v3 September 2009 and HP-UX 11i v3 March 2010 nodes. During a rolling update from HP-UX 11i v3 September 2009 to HP-UX 11i v3 March 2010, you cannot use MORE on the shared volume group. Related documentation LVM and MirrorDisk/UX manpages are installed with the product and provide the latest documentation for all LVM commands and options. These manpages can be displayed via the man command.
