HP Array Controller HSG V8.7 Software - Manual (Page 183)

UltraSCSI RAID Enclosure C–1
Appendix C
Installing EMU Microcode
The microcode resident in the EMU memory controls all the
UltraSCSI RAID enclosure (DS–BA370 series) EMU operations.
Proper operation of the subsystem requires that all EMUs have the
same revision level microcode. Upon system startup, the master EMU
polls the expansion EMUs to ensure that they have the correct
microcode. When microcodes are a different revision level, the master
EMU automatically downloads the latest microcode revision over the
EMU communications bus.
Microcode Upgrades
Microcode upgrades can be downloaded from a personal computer
(PC) to the master EMU. To download the microcode, the PC is
connected to the center UART connector and a communications
program, such as PROCOMM PLUS®, is used.
Note
If PROCOMM PLUS is not used, the prompts, displays,
and responses might be different from those presented in
this document. Refer to the communications program user
documentation for the proper procedures and results.