Chapter 5: Subsystem Maintenance and Upgrading
Figure 5-5: Removing a DIMM Module
Step 4.
Insert the new DDR RAM DIMM module into the
DIMM socket.
Align the new module to the DIMM socket
and note how the module is keyed. Firmly press the
DIMM module into the socket making sure the module is
completely seated in the socket. The ejector tabs on
each end of the socket will snap into proper positions.
(See
Error! Reference source not found.)
Step 5.
Install the controller module and BBU module
back in
its original locations. (See
Section 5.2.3
)
5.4
Replacing a Faulty BBU
The BBU can sustain cache memory in the event of a power failure
or in the extremely unlikely event of failing both PSUs. The BBU
provides additional data security and helps minimize the chance of
losing data during power outages.
Each BBU contains battery cells mounted on a metal bracket, and
connects to an adaptor board within the RAID controller. The BBU is
secured to the RAID controller at the top center of the faceplate using
one (1) retention screw. If a BBU fails, it should be replaced as soon
as possible.
Replacing a Faulty BBU
5-9
