HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Maintenance and Service Guide (EK-G80MS-SA. C01, March 2005)

Upgrading the Subsystem
186 HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software
Maintenance and Service Guide
16. Mount the logical units on the host.
17. Disconnect the PC or terminal from the maintenance port of controller A.
18. Refer to the “After-upgrade maintenance checks” section that starts on
page 213 for additional after-upgrade steps if you are upgrading from ACS
V8.7-2 or later.
Upgrading to ACS V8.8- x P software
ACS V8.8-xP implements the Data Replication Manager (DRM) feature, which
can also be upgraded by using either a rolling or shutdown upgrade method. These
upgrade methods apply only to dual-redundant controller configurations.
Rolling upgrade procedures for DRM configurations
This rolling upgrade procedure allows the disk units to be accessible to connected
hosts during the upgrade process with minimal disruption. Specific controllers are
referred to as controller A or controller B during the procedure. For clarity, the
CLI prompts illustrated in the procedure use HSGA> and HSGB> to indicate
which controller (A or B) is used.
Note: Before upgrading ACS V8.8- x P, take note of the following details:
■ The following steps must be followed carefully for the upgrade procedure to work
properly. This procedure takes approximately 10 to 20 minutes, depending upon
the complexity of the configuration.
■ If you are upgrading from V8.6- x , the units involved are briefly unavailable twice
during the procedures for approximately 10 to 20 seconds at each site. (See
step 16 on page 193 and step 21 on page 194 for the initiator site. See step 17
on page 199 and step 22 on page 201 for the target site.)
■ HP recommends that no remote copy set normalize, merge, or copy operations be
active at the time the upgrade procedures begins.
■ The rolling upgrade procedure upgrades the initiator site controllers to a specific
point, and then fully upgrades the target site controllers before finalizing the
upgrade for the initiator site controllers.
■ If you have several servers with multiple LUNs in your SAN and are using HP
StorageWorks Secure Path Manager, HP recommends that you verify that all units
are online by using the SHOW UNITS FULL CLI command. Afterwards, move all
LUNs to the controller to be updated last by using HP StorageWorks Secure Path
Manager. (LUNs may be moved by either controller.)