HP StorageWorks Data Replication Manager HSG80 ACS Version 8.7P Configuration Guide (AA-RPHZF-TE, March 2004)

Upgrading to ACS Version 8.7P Software
225Data Replication Manager HSG80 ACS Version 8.7P Configuration Guide
I 4. Identify and record the current CACHE_FLUSH_TIMER value:
HSGA> SHOW THIS_CONTROLLER
The following text is only a portion of the resulting display:
Note: The CACHE_FLUSH_TIMER value is displayed in the caching parameters section. This
parameter is modified during the procedure and must be restored later.
I 5. For each unit, identify and record the unit WRITEBACK_CACHE characteristics by
issuing the following command:
HSGA> SHOW UNITS FULL
Note: The unit WRITEBACK_CACHE characteristics are modified during the upgrade
procedure and must be restored later.
I 6. Set the CACHE_FLUSH_TIMER to 1 second to minimize the flush time:
HSGA> SET THIS_CONTROLLER CACHE_FLUSH_TIMER=1
HSGA> SET OTHER_CONTROLLER CACHE_FLUSH_TIMER=1
I 7. Disable writeback caching on all units (to help minimize failover time) by issuing the
following command as required for each unit:
HSGA> SET unit-name NOWRITEBACK_CACHE
I 8. Determine whether all data has been flushed from the cache module:
HSGA> SHOW THIS_CONTROLLER
The following text is only a portion of the resulting display:
Note: Repeat this step on both controllers (THIS_CONTROLLER and OTHER_CONTROLLER) until
no unflushed data remains in either cache module memory.
If unwritten data is present after 15 minutes, verify that WRITEBACK_CACHE is disabled on all units
by issuing the SHOW UNITS FULL command. For any units with WRITEBACK_CACHE enabled,
return to step 7 and proceed.
Cache:
256 megabyte write cache, version 0022
Cache is GOOD
No unflushed data in cache
CACHE_FLUSH_TIMER=DEFAULT (10 seconds)
Cache:
256 megabyte write cache, version 0022
Cache is GOOD
No unflushed data in cache
CACHE_FLUSH_TIMER=1 SECOND