4.0.0 HP Polyserve Matrix Server Upgrade Guide (T5392-96049, April 2010)

Back up PSFS filesystems
You should have recent backups of all PSFS filesystems for disaster recovery purposes.
Upgrade scenarios
There are three ways to perform the upgrade to Matrix Server 4.0.0 and the
corresponding versions of the HP PolyServe Software:
• Perform a rolling upgrade. In this procedure, servers are removed from the matrix,
upgraded, and returned to the matrix one-at-a-time. This method does not require
matrix downtime, but clients may experience brief outages during failovers. See
Chapter 2 on page 7.
• Upgrade all servers at once. This procedure requires that the matrix be completely
shut down during the upgrade. See Chapter 3 on page 13.
• Upgrade the servers in two groups. This method minimizes overall downtime. See
Chapter 3 on page 13.
Overview6