Lenovo ThinkServer TD230 Hardware Maintenance Manual page 98

What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation, go to "Completing the parts replacement" on page 122. Then, refer to
Chapter 7 "Configuring the server" on page 143 for information about RAID configuration.
Installing the ThinkServer 8708EM2 RAID Battery
This topic provides information about installing the ThinkServer 8708EM2 RAID Battery (hereafter referred to
as the battery card assembly) on the RAID card. The battery card assembly mounts directly to the RAID card
through a small board-to-board connector (daughtercard).
Notes:
1. The battery card assembly protects the integrity of the cached data on the RAID controller by providing
backup power up to 72 hours in the case of a complete ac power failure or a brief power outage. It
has built-in functionality to charge the battery pack automatically and to communicate battery status
information such as voltage, temperature, and current to your server. It also provides an inexpensive
alternative to using an uninterruptible power supply, and a second level of fault tolerance when used
in conjunction with an uninterruptible power supply. For more information about the battery card
assembly, see Appendix A "RAID battery card assembly" on page 161.
2. The battery card assembly option kit contains a user guide, the battery card assembly, and three
Phillips-head screws. Do not remove the battery card assembly from the antistatic shipping container
until you are ready to install it. When you remove the battery card assembly from your server, place it in
its original container.
3. Check the appropriate support Web sites for the latest updates for your basic input/output system
(BIOS) code, utility programs, device drivers, and other software applications. Follow the instructions
provided by your Service Provider to download and install updates.
4. It is recommended that you replace the battery pack on the battery card assembly annually or after
500 recharging cycles, whichever comes first.
5. The temperature of the battery card assembly is generally 15-20°C (59-68°F) higher than the ambient
temperature during fast charge. Therefore, to complete a fast charge cycle, the ambient temperature
should be lower than 45°C (113°F). If the ambient temperature exceeds 45°C (113°F), the fast charge
cycle will terminate prematurely, thus preventing the battery card assembly from reaching a fully
charged state.
Attention:
• When attaching the battery card assembly to a PCI Express slot, center the Phillips-head screw driver to
avoid damaging the screw head and do not over-tighten the screws as you might damage the battery
card assembly.
• The battery in the battery card assembly must recharge for at least six hours during fast charge under
normal operating conditions.
To install the battery card assembly onto the RAID card, do the following:
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ThinkServer TD230 Hardware Maintenance Manual