User`s guide

Example 4–3 shows a controller subsystem with a Version 2, 32-MB write-back
cache module:
Example 4–3 Version 2 32-MB Write-Back Cache Module
KATHYM>SHOW THIS_CONTROLLER
Controller:
HSJ40 (C) DEC ZG313FF106 Firmware V25J, Hardware 0000
Configured for dual-redundancy with ZG31900458
In dual-redundant configuration
SCSI address 7
Time: 14-FEB-1995 15:21:10
Host port:
Node name: HSJA1, valid CI node 3, 32 max nodes
System ID 420010031B85
Path A is ON
Path B is ON
MSCP allocation class 4
TMSCP allocation class 4
CI_ARBITRATION = ASYNCHRONOUS
Cache:
32 megabyte write cache, version 2
Cache is GOOD
Battery is GOOD
Unflushed data in cache
CACHE_FLUSH_TIMER = DEFAULT (10 seconds)
CACHE_POLICY= A
KATHYM>
As you can see, the cache module size and version are displayed, as well as the
status of the cache module and the write-back cache module batteries. You need
to know the version type to determine what option numbers to order for your
upgrade.
See Tables 4–3 through 4–6 for ordering information.
Note
Version 1 read cache modules cannot be upgraded to write-back cache
modules. These modules must be returned to Digital after ordering the
proper options.
Installation 4–33