© 2016 DDN STORAGE. P/N 15-000836-001
SFA7700 CMOS and Backup Battery Replacement Instructions | 11
1.
Begin by disconnecting the battery baseboard cable from its connector on the baseboard in
the lower half of the controller canister.
C
AUTION
:
During this part of the procedure be careful not to pull the wires connected to
the CMOS battery.
2.
With the battery cables disconnected, use the Phillips head screwdriver to remove the six
screws and washers holding the battery pack unit to the upper part of the canister, two of
which also hold the CMOS battery to the backup battery pack assembly (Figure 14).
Figure 14
3.
Set aside the CMOS battery and bracket.
4.
Replace the expired battery pack with the replacment.
5.
Reattach first the battery pack.
6.
Attach the CMOS battery and bracket.
When to Replace the CMOS Battery
In the SFA OS logs, the CMOS battery is reported and referred to as the VBAT. When the CMOS
battery voltage falls below its non-critical threshold, the system generates a warning. This warning
message can be seen in the event logs and is noted in the output of
SHOW VOLTAGE ALL
(excerpt in
Figure 15).
