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Chapter 4
Replace Slammer Batteries
46
Pillar Data Systems Confidential
Replace Slammer Batteries
Each Slammer control unit (CU) has a single battery that
provides backup power to two of the six memory module slots
on the motherboard. The figure below shows a battery.
Figure 14 Slammer battery FRU
The battery charger within a Slammer CU keeps the battery
charged. The battery can sustain power to the two memory
slots for 72 hr for systems with 3 or 6 GB of memory per CU
and for 48 hr for systems with 12 GB of memory per CU.
Important!
If a power failure exceeds the above 72- or 48-hr
limit, the battery could be overly discharged. In this case, you
should replace the battery.
Important!
After recovery from a power failure and while the
battery is charging, the system operates in conservative
(write-through cache) mode. The system stays in this mode
until the battery charge reaches 80% of battery capacity,
which may take up to 12 hr of normal power. If the battery is
severely discharged, recharge time can take up to 18 hr or
more. If the battery takes longer that 18 hr to reach a full
charge, you should replace the battery.
Serial number
label
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date
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