User's Manual

Cache battery
Batteries provide backup power to maintain the contents of the controller cache when AC power
is lost and the storage system has not been shutdown properly. When fully charged the batteries
can sustain the cache contents for to 96 hours. Two batteries are used on the EVA8x00 and a
single battery is used on the EVA6x00 and EVA4x00. Figure 25 (page 51) illustrates the location
of the cache batteries and the battery status indicators. See Table 24 (page 51) for additional
information on the status indicators.
Figure 25 Cache batteries
2. Fault indicator1. Status indicator
4. Battery 13. Battery 0
The table below describes the battery status indicators. When a battery is first installed, the fault
indicator goes on (solid) for approximately 30 seconds while the system discovers the new battery.
Then, the battery status indicators display the battery status as described in the table below.
Table 24 Battery status indicators
DescriptionFault indicatorStatus indicator
Normal operation. A maintenance charge process keeps the battery fully
charged.
OffOn
Battery is undergoing a full charging process. This is the indication you
typically see after installing a new battery.
OffFlashing
Battery fault. The battery has failed and should be replaced.OnOff
The battery has experienced an over temperature fault.FlashingOff
Battery code is being updated. When a new battery is installed, it may
be necessary for the controllers to update the code on the battery to the
Flashing (fast)Flashing (fast)
correct version. Both indicators flash rapidly for approximately 30
seconds.
Battery is undergoing a scheduled battery load test, during which the
battery is discharged and then recharged to ensure it is working properly.
FlashingFlashing
During the discharge cycle, you will see this display. The load test occurs
infrequently and takes several hours.
HSV controller cabling
All data cables and power cables attach to the rear of the controller. Adjacent to each data
connector is a two-colored link status indicator. Table 18 (page 45) identifies the status conditions
presented by these indicators.
NOTE: These indicators do not indicate whether there is communication on the link, only whether
the link can transmit and receive data.
HSV controllers 51