HSG60 and HSG80 Controller and HSx80 Cache Module Replacement Procedures for Array Controller Software V8.7x-x Release Notes

Special Considerations
10 HP StorageWorks HSG60 and HSG80 Controller and HSx80 Cache Module Replacement
Procedures for Array Controller Software V8.7x-x Release Notes
Replacement Controller Configuration and Cache Module Prerequisites
Note the following prerequisites before starting replacement procedures:
■ Hardware Compatibility—The replacement controller hardware must be
compatible with the remaining controller hardware. Refer to product-specific
release notes and documentation for information regarding hardware
compatibility.
■ Software Compatibility—The software versions and patch levels of the
replacement controller must be the same as that of the operational controller
or the controller being replaced.
■ Cache Module Memory Configuration—The replacement cache module
normally uses DIMMs from the cache module being replaced. When
replacing DIMMs, you must install DIMMs in the replacement cache module
in same position as they were in the cache module that is being replaced.
■ Facility Baud Rate—Record the baud rate of the operational controller.
Caution: Failure to use a newly initialized controller causes cache corruption
on the replacement controller mirrored cache.
Controller Replacement in DRM Configurations
Perform the procedure in the following subsections if a controller in Data
Replication Manager (DRM) configuration needs to be replaced. Figure 3 on
page 11 provides a graphical illustration of the controller replacement process for
DRM configurations.
Caution: In DRM configurations, use a factory-provided or newly initialized
(configuration-free) controllers to avoid mirrored cache corruption on the
replacement controller or recursive bugchecks (OCP code 25) on both initiator
controllers.