HP Serviceguard Version A.11.19 Release Notes, July 2009

Table Of Contents
The Serviceguard version bundled with the HP-UX Operating Environment (OE)
matches the version already installed.
CAUTION: You need to pay careful attention to the Serviceguard patch level as
well as the Serviceguard version. If you install Serviceguard at a patch level lower
than the one the cluster was running, any new features introduced in the
higher-level patch will cease to be available; you will need to re-install the
higher-level patch on all nodes before you can use its features again.
The Serviceguard product bundled with the HP-UX OE is installed along with the
HP-UX filesets.
(The Serviceguard binary files differ between HP-UX 11i v2 and 11i v3, even though
the Serviceguard version is the same.)
NOTE: You can apply Serviceguard patches without doing a rolling upgrade.
Rules and Restrictions for Heterogeneous Clusters
A Serviceguard 11.19 cluster can accommodate a mix of nodes running HP-UX 11i v2
and 11i v3, with the following restrictions:
Each node must be running either HP–UX 11i v2 or 11i v3. No other operating
system, or operating-system version (such as 11i v1) is permitted.
Except during a rolling upgrade of Serviceguard (see “Rules and Restrictions for
Clusters in Transition” (page 51)), all the nodes must be running Serviceguard
A.11.19.
IMPORTANT: This means, for example, that before you can add a node running
HP-UX 11i v3 to a cluster in which the existing nodes are running 11i v2, all the
11i v2 nodes, and the new 11i v3 node, must have Serviceguard A.11.19 installed.
See also “Recommendations” (page 53).
Some HP–UX 11i v3 features must not be used as long as any nodes are running
11i v2. These features specifically must not be used:
LVM 2.0 volume groups
Agile addressing (see About Device Special Files (DSFs)” (page 43) for more
information about agile addressing)
NOTE: Native multipathing, which is enabled by default on HP-UX 11i v3, can
be used on 11i v3 nodes in a heterogeneous cluster.
The cluster must not be using Oracle RAC. (SGeRAC is not supported in a
heterogeneous cluster because Oracle RAC does not support mixing HP-UX
versions within a single RAC cluster.)
52 Serviceguard Version A.11.19 Release Notes