IBM ServeRAID M5014, User Manual, Page: 57 / 106

ServeRAID M5014/M5015 SAS/SATA Controller User’s Guide 5-1
Chapter 5
Installing a ServeRAID
M5000 Series Battery
Assembly
This chapter explains how to install a ServeRAID M5000 Series Battery
Assembly on the ServeRAID M5014 controller.
Note: The ServeRAID M5000 Series Battery Assembly is pre-
installed on the ServeRAID M5015 controller.
Attention: Electrostatic discharge can damage the battery assembly
and the controller on which it is installed. Always ground
yourself and/or use a ground strap before you touch the
controller or the battery assembly. Perform all installation
work at an ESD safe workstation that meets the
requirements of EIA-625—“Requirements for Handling
Electrostatic Discharge Sensitive Devices.” Follow the ESD
recommended practices in the latest revision of IPC-A-610.
The battery in the battery assembly must charge for at least six hours
during fast charge under normal operating conditions. To protect your
data, the firmware changes the Write Policy to
write-through until the
battery unit is sufficiently charged. When the battery unit is charged, the
SAS/SATA controller firmware changes the Write Policy to
write-back to
take advantage of the performance benefits of data caching.
The maximum ambient temperature for battery packs is 0° C to 45° C.
Note: The temperature of the battery pack during fast charge is
typically 15–20 degrees higher than the ambient
temperature. Therefore, for the fast charge circuit to
complete a fast charge cycle, ambient temperature should
be less than 40° C. If the ambient temperature is greater
than 40° C, the fast charge cycle could terminate
prematurely.