Veritas 5.0.1 Installation Guide HP-UX 11i v3 (5900-2464, September 2012)

• Support for LVM version 2 Volume Groups
The LVM version 2 volume groups are now partially supported. VxVM now identifies and
protects the LVM version 2 volume groups. However, the LVM version 2 volume groups cannot
be initialized or converted.
• Distributed Volume Recovery
In a Cluster Volume Manager (CVM) cluster, upon a node failure, the mirror recovery is initiated
by the CVM master. Prior to this release, the CVM master performed all the recovery I/O
tasks. Starting from this release, the CVM master can distribute recovery tasks to other nodes
in the cluster. Distributing the recovery tasks is desirable in some situations so that the CVM
master can avoid an I/O or CPU bottleneck.
• Campus Cluster enhancements
The campus cluster feature provides the capability of mirroring volumes across sites, with hosts
connected to storage at all sites through a Fibre Channel network. In this release, the following
enhancements have been made to the campus cluster feature:
◦ Site Tagging of disks or Enclosures
◦ Automatic Site Tagging
◦ Site Renaming
• Estimated Required Time Displayed During Volume Conversion
During a volume conversion operation, before the conversion is committed, the vxvmconvert
command displays the estimated time required.
• The vxsited daemon Renamed to vxattachd
The vxsited daemon is renamed as the vxattachd daemon. The vxattachd daemon
now also handles automatic reattachment and resynchronization for plexes.
• Automatic Plex Attachment
When a mirror plex encounters irrecoverable errors, VxVM detaches the plex from the mirrored
volume. By default, VxVM automatically reattaches the affected mirror plexes when the
underlying failed disk or LUN becomes visible.
VxVM 5.0.1 on HP–UX 11i v3
For more information on features that VxVM 5.0.1 supports on HP-UX 11i v3, see the Veritas
Volume Manager 5.0.1 Release Notes, at http://docs.hp.com.
Architecture of VxVM
VxVM operates as a subsystem between the HP-UX operating system and other data management
systems, such as file systems and database management systems. VxVM is layered on top of the
operating system and is dependent on it for the following:
• Physical access to disks
• Device handles
• VM disks
• Multipathing
Veritas Volume Manager (VxVM) 13