Specifications

1–18 General Description
When the batteries are fully charged, an ECB can preserve 512 MB of cache memory
for 24 hours. However, the battery capacity depends upon the size of memory
contained in the cache module, as defined in the Table 1–8.
Charging Diagnostics
Whenever you restart the controller, its diagnostic routines automatically check the
charge in the ECB’s batteries. If the batteries are fully charged, the controller reports
them as good and rechecks them every 24 hours. If the batteries are charging, the
controller rechecks them every four minutes. Batteries are reported as being either
above or below 50 percent in capacity. Batteries below 50 percent in capacity are
referred to as being low.
This four-minute polling continues for up to 10 hours—the maximum time it should
take to recharge the batteries. If the batteries have not been charged sufficiently after
10 hours, the controller declares them to be failed.
Table 1–8. ECB Capacity Based on Memory Size
Size DIMM Combinations Capacity
64 MB Two, 32 MB 96 hours
128 MB Four, 32 MB 48 hours
256 MB Two, 128 MB 48 hours
512 MB Four, 128 MB 24 hours