Serviceguard Extension for RAC Version A.11.18 Release Notes, 3rd Edition, April 2008

NOTE: When using LVM version 2.0, the volume groups are supported with
Serviceguard. The steps for configuring the volume groups in Serviceguard clusters is
the same for both LVM version 1.0 and 2.0.
For more information on using and configuring LVM version 2.0, see the HP-UX 11i
Version 3: HP-UX System Administrator's Guide: Logical Volume Management located at:
http://docs.hp.com -> Core HP-UX 11iv3 -> LVM Volume Manager
LVM version 2 has compatibility requirements as indicated in the note below. For a
complete list of support and compatibility requirements see the
Serviceguard/SGeRAC/SMS/Serviceguard Mgr Plug-in Compatibility and Feature Matrix at
http://docs.hp.com -> High Availability -> Serviceguard -> Support Matrixes
NOTE: LVM version 2 is only supported with SGeRAC version A.11.18 on HP-UX
11i v3, and requires the Serviceguard April 2008 Patch (PHSS_37602 or later).
For more information, see the Serviceguard Version A.11.18 Release Notes at
http://docs.hp.com -> High Availability -> Serviceguard
Support for Veritas Volume Manager (VxVM)
Veritas (VxVM) 4.1 from Symantec is supported on HP-UX 11i v3, but VxVM 3.5 is not.
If you are running VxVM 3.5 (as part of the Base Product included with HP-UX), you
can do a rolling upgrade to Serviceguard A.11.18 on HP-UX 11i v3 with VxVM 4.1.
Native Multipathing, Veritas DMP, and Related Features
The HP-UX 11i v3 I/O subsystem provides multipathing and load balancing by default.
This is often referred to as native multipathing. Veritas Volume Manager (VxVM)
version 4.1 and Dynamic Multipathing (DMP) from Symantec are supported on HP-UX
11i v3, but do not provide multipathing and load balancing; DMP acts as a pass-through
driver, allowing multipathing and load balancing to be controlled by the HP-UX I/O
subsystem instead.
When you upgrade a system to HP-UX 11i v3, the I/O subsystem by default will start
performing load balancing and multipathing for all multipath devices (whether or not
they are managed by VxVM/DMP, and whether or not you decide to migrate the system
to agile addressing); you do not have to take any additional steps to make this happen.
For more information about multipathing in HP-UX 11i v3, see the white paper HP-UX
11i v3 Native Multipathing for Mass Storage, and the Logical Volume Management volume
of the HP-UX System Administrator’s Guide in the HP-UX 11i v3 Operating Environments
collection at http://docs.hp.com.
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