HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Troubleshooting Guide (EK-G80TS-SA. C01, March 2005)

Utilities and Exercisers
132 HSG60 and HSG80 Array Controller and Array Controller Software Troubleshooting Guide
Field Replacement Utility (FRUTIL)
Use FRUTIL to replace a failed controller, cache module, or ECB, in a
dual-redundant controller configuration, without shutting down the subsystem.
Refer to the controller maintenance and service guide for a more detailed
explanation of how FRUTIL is used during the replacement process.
Note: FRUTIL cannot run in remote copy set environments while I/O is in progress to
the target side due to host write and normalization (ACS V8.8P only).