HP StorageWorks HSG80 Array Controller V8.7 Maintenance And Service Manual page 130

Upgrading the Subsystem
c. Disable the CCL using the following command:
HSGA> SET THIS_CONTROLLER NOCOMMAND_CONSOLE_LUN
3. Connect a PC or terminal to the maintenance port of Controller A.
4. If upgrading from ACS Version 8.5S or 8.6S to 8.7S, delete all snapshot units.
a. Identify all snapshot units using the following command:
HSGA> SHOW UNITS FULL
b. Record the configuration for each snapshot unit for restoration in step 12.
c. Individually delete all snapshot units using the following command:
HSGA> DELETE snapshot-unit-name
5. Verify that all appropriate units were deleted using the following command:
HSGA> SHOW UNITS FULL
IMPORTANT: If any snapshot unit exists, repeat step 4.
6. Identify and record the current CACHE_FLUSH_TIMER value using the
following command:
HSGA> SHOW THIS_CONTROLLER
The following text is only a portion of the resulting display—an arrow points to the
pertinent status indication:
Cache:
256 megabyte write cache, version 0022
Cache is GOOD
No unflushed data in cache
CACHE_FLUSH_TIMER=DEFAULT (10 seconds)
NOTE: The CACHE_FLUSH_TIMER value is displayed in the caching parameters section.
This parameter is modified during the procedure and must be restored in step 11.
7. Set the CACHE_FLUSH_TIMER to 1 second using the following commands:
HSGA> SET THIS_CONTROLLER CACHE_FLUSH_TIMER=1
HSGA> SET OTHER_CONTROLLER CACHE_FLUSH_TIMER=1
8. Determine if all data has been flushed from the cache module, using the following
command:
HSGA> SHOW THIS_CONTROLLER
5–10 HSG80 Array Controller V8.7 Maintenance and Service Guide