HP-UX Logical Volume Manager and MirrorDisk/UX Release Notes HP-UX 11i v3 (September 2010)

Mass Storage Critical Resource Analysis
The Mass Storage Critical Resource Analysis (MS CRA) tool checks for a maximum of two mirror
copies of a logical volume. However, Version 2.0 and higher volume groups allow up to five mirror
copies. To enable MS CRA to check for a maximum of five mirror copies of a volume, you must
install the following patch, or a superseding patch:
• PHCO_37562
MS CRA checks for a maximum of 511 physical volumes in a volume group. However, Version
2.1 volume groups allow up to 2048 physical volumes. To enable MS CRA to check for a maximum
of 2048 physical volumes in a volume group, you must install the following patch:
• PHCO_38145
PHCO_38145 supersedes PHCO_37562. Installing PHCO_38145 enables both checks.
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.
Customers requiring Version 2.1 volume group support or Version 2.0 and higher cluster lock disks
must install the HP Serviceguard September 2008 patch. For more information, see the HP
Serviceguard Version A.11.18 Release Notes.
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.
Compatibility issues
This release is specific for HP-UX 11i v3 (B.11.31). The following compatibility issues exist in the
September 2010 web release of HP-UX 11i v3.
Version 2.x volume groups
• Version 2.2 volume groups are not recognized on previous releases of HP-UX, including
versions of HP-UX 11i v3 prior to the March 2010 Update release. Version 2.1 volume groups
are not recognized on previous releases of HP-UX, including versions of HP-UX 11i v3 prior
Compatibility issues 9