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Chapter 3 Storage Arrays 3-3
The Battery Charging/Charged light flashes during the startup self-test and when
the battery is charging. It turns on and does not flash when the battery is fully
charged, and turns off if the battery fails.
Figure 3-2 shows the controller labels. Each controller has a media access control
(MAC) address label, located on the top or the front of the controller, and a battery
label, located on top of the controller, which lists the battery installation and
expiration dates.
FIGURE 3-2 Label Locations on the Controller
3.1.1.4 Controller Memory
Note – IMPORTANT For specific information on the controller memory, refer to the
Product Release Notes.
Each controller has 1 GB of memory for processor memory and data cache. The
processor memory is used to store application data, while the data is in cache
memory.
If caching has been enabled and data is in the cache, the Cache Active light on the
controller turns on but does not flash. If caching is enabled and the Cache Active
light never turns on during I/O activity, a cache memory failure or a battery failure
has occurred.
Figure 3-3 shows the Cache Active light and the Battery Charging/Charged light.