Specifications

3–18 Compaq StorageWorks HSG80 Array Controller ACS Version 8.5 Maintenance and Service Guide
IMPORTANT: For ACS V8.5P installations, the required cache memory configuration is 512 MB.
For ACS V8.5S, Compaq strongly recommends using 512 MB of cache memory.
To upgrade cache module memory, its controller must be shut down. Use the following
steps to upgrade or add DIMMs:
CAUTION: ESD can easily damage a cache module or a DIMM. Wear a snug-fitting,
grounded ESD wrist strap.
1. From the host console, dismount the logical units in the subsystem.
2. If using a Windows NT platform, shut down the server.
3. If the controller is operating, connect a PC or terminal to the controller maintenance
port.
If the controller is not operating, proceed to step 5.
4. Shut down the controllers.
■ In single-controller configurations, shut down “this controller” with the following
command:
SHUTDOWN THIS_CONTROLLER
■
In dual-redundant controller configurations, shut down the “other controller” first,
then shut down “this controller” with the following commands:
SHUTDOWN OTHER_CONTROLLER
SHUTDOWN THIS_CONTROLLER
When the controllers shut down, the reset buttons and the first three LEDs are lit
continuously (see Figure 2–4). Receiving this indication can take several minutes,
depending on the amount of data that needs to be flushed from the cache modules.
Table 3–1 Cache Module Memory Configurations
Memory DIMMs Quantity Location
64 MB 32 MB 2
128 MB 32 MB 4
256 MB 128 MB 2
512 MB 128 MB 4