HP OpenView Storage Mirroring Getting Started (359447-001, May 2004)

Additional upgrading guidelines

When you are upgrading Storage Mirroring, keep in mind the

following limitations between versions.

! Clients—The Management Console and text clients are

dependent on the major version, but a client cannot control a

server running a later release. For example, a 4.3 client can

control any 4.3 or earlier source or target. A 4.2 client can

control any 4.2 or earlier source or target, but it cannot

control the later 4.3 server.

! Servers—Source and target servers should be the same major

and minor version, although to accomodate rolling upgrades, a

Storage Mirroring 4.2 source can connect to a Storage

Mirroring 4.3 target. These versions are not reciprocal: a

Storage Mirroring 4.3 source cannot connect to a Storage

Mirroring 4.2 target.

NOTE: A Storage Mirroring major version is identified by

the first numeral and the minor version is identified

by the second numeral. For example, in the release

4.3, 4 is the major version number and 3 is the minor

version number. Additional numbers beyond the

major and minor version indicate service packs,

hotfixes, and build numbers.

NOTE: When performing a rolling upgrade, update the

target servers first. After the upgrade is

complete and the target servers are rebooted,

the sources will automatically reconnect to the

targets. Upgrade the sources when convenient.

If you are using a chained configuration, update

the last target first, then update the middle

server acting as both a source and target, and

update the production source last.