HP StorageWorks 500 Modular Smart Array - Manual (Page 55)

Hardware Options Installation
HP StorageWorks Modular Smart Array 500 System User Guide 3-11
Cache Upgrade Option
The controller ships with a 128-MB battery-backed cache module. A 256-MB
battery-backed cache module is available as an option. Before installing a cache
upgrade, observe the following guidelines:
• Always power down the system before performing a cache upgrade.
• If a controller has more than one cache DIMM, be sure that both DIMMs have
the same memory capacity.
• Always upgrade the cache in both controllers in a system with redundant
controllers.
• In a system with a redundant controller, be sure that both controllers have the
same number of DIMMs and that all DIMMs have the same memory capacity.
To upgrade the cache:
1. Power down the system. Refer to “System Power Down” in this chapter.
2. Remove the controller.
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