HSG80 Enterprise/Modular Storage RAID Array Fibre Channel Solution Software V8.7A for Windows Release Notes (AA-RH0QL-TE, July 2003)

ACS Feature Support

Release Notes – HSG80 Enterprise/Modular Storage RAID Array Fibre Channel Solution

Software Version 8.7A for Windows

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 20.

8. For each unit, identify and record the unit write-back cache, read-ahead cache,

read cache, and Preferred Path characteristics by using the following command:

HSGA> SHOW UNITS FULL

These characteristics are modified during the upgrade procedure and must be restored

in step 21.

NOTE: The switch for Preferred Path is available only with a multi-bus configuration. It is not

available in the transparent failover mode.

9. Set the cache flush timer to 1 second by using the following commands:

HSGA> SET THIS_CONTROLLER CACHE_FLUSH_TIMER=1

HSGA> SET OTHER_CONTROLLER CACHE_FLUSH_TIMER=1

10. Clear any unit with the PREFERRED_PATH switch set, by using the following

command as required for each unit:

HSGA> SET <unit-name> NOPREFERRED_PATH

11. Disable write-back, read-ahead, and read caching on all units by using the

following command as required for each unit:

HSGA> SET <unit-name> NOWRITEBACK_CACHE NOREADAHEAD_CACHE

NOREAD_CACHE

NOTE: The xxx_CACHE switches must be entered in the specified order, or the command is

rejected.

12. Determine whether all data was flushed from the cache module by using the

following command on both controllers:

HSGA> SHOW THIS_CONTROLLER

HSGA> SHOW OTHER_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=1 SECOND