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

Replacing BA370, M2100 & M2200 Enclosure Elements
108 HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software
Maintenance and Service Guide
■ 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 factory-fresh configured controller or one that is
reset with the Port #5 button reset action can cause cache corruption on the
replacement controller mirrored cache.
■ Storage Building Blocks—You can replace the controller, cache module, or
external cache battery (ECB) storage building block (SBB) while the storage
system is shut down by taking the following actions. First, issue the SET
NOFAILOVER CLI command from the operational controller. This takes the
units and moves them from the controller that is to be replaced to the
operational controller. Second, shut down the controller to be replaced by
entering the SHUTDOWN THIS_CONTROLLER CLI command from each
controller prior to shutting down the controller. These commands instruct the
array controllers to flush all unwritten data from the cache modules and
discontinue all I/O activity.
Special considerations for replacing array controllers in DRM configurations
Perform the procedure in the following subsections if a controller in Data
Replication Manager (DRM) configuration needs to be replaced.
Note: If you are using ACS V8.8P with DRM, FRUTIL cannot be run in remote copy set
environments on the target side specifically when I/O is in progress (including
normalization I/O). If the host load is stopped, you can run
FRUTIL on the initiator or
target. If the host load is not quiesced and
FRUTIL is run while remote copy I/O is
running, the normalization process is reset.