HP StorageWorks HSG80 Enterprise Modular Storage RAID Array Fibre Channel Solution Software V8.8 for Linux X86 Release Notes (AA-RV1KA-TE, March 2005)

ACS Enhancements and Fixes
20 HSG80 Enterprise Modular Storage RAID Array Fibre Channel Solution Software V8.8 for Linux
X86 Release Notes
ACS Downgrade
With this release, you can downgrade ACS from V8.8-1 to V8.7-1 or V8.6-1 (the
base version). No other versions are supported. With this, changes have been
made to associated screens. Refer to the HP StorageWorks HSG60 and HSG80
Array Controller and Array Controller Software Maintenance and Service Guide
for additional information.
Note: If you are downgrading ACS V8.8-1 and pre-existing patches from V8.6 or
V8.7 remain in controller memory, the system downgrades your system to the highest
patch level that was previously installed.
Procedural Changes When Modifying Cache Mirror Mode
After entering the CLI command to change the cache operational mode
(MIRRORED_CACHE or NOMIRRORED_CACHE), array controllers now display a
report showing units with persistent reservations. Following this screen report, the
system requires you to determine which units are attached to the same cluster or
host before changing the cache configuration. Refer to the HP StorageWorks
HSG60 and HSG80 Array Controller and Array Controller Software Command
Line Interface Reference Guide for more information.
Note: Since Tru64 UNIX host systems automatically assume that persistent reservations
are never lost and array controllers automatically restructure cache data whenever its
operational mode is changed, additional steps must be taken. First, you must associate
any one unit with persistent reservations. Then, you must enter the
SET
unit FAKE_PR command to restore persistent reservations that may have
been lost. Lastly, you must execute any type of Tru64 UNIX host operation that results in
a read to physical unit associated to restore all persistent reservations. Doing this,
causes Tru64 UNIX host systems to re-establish unit persistent reservation structures.
Note: Units associated with clusters require that you individually invoke the SET
unit-number FAKE_PR command against each unit.