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EonStor S16E-R1240/G1240 Installation and Hardware Reference Manual
7-2. With a redundant-controller subsystem, RAID controllers
should spend a short while negotiating with each other and
then deliver a “Redundant Controller Restored” message.
You can check for this message on the LCD screen, GUI
manager, or firmware text-based utility. When the
replacement controller is successfully brought online, its
Controller status LED should light green on its faceplate.
5.3. Replacing or Upgrading Memory Modules
5.3.1 Memory Module Installation Overview

The system comes with a pre-installed 1GB (or above) DDR-II DIMM
module. The controller supports a memory module up to 2GB in size. If
you need a larger DDR-II module or the original DIMM module
malfunctions in some way (often shown as the “NVRAM failure” event),
the pre-installed module can be replaced. Replacement and installation
instructions are described below.

A DIMM socket is located on the controller main circuit board.
WARNING!
The controller board in the controller module is a sensitive item. Please
ensure that all anti-static precautions stipulated above are strictly adhered
to.
5.3.2 Selecting the Memory Modules
Compatibility: To avoid the compatibility issues, it is recommended to
contact Infortrend or your system vendor for a compatible module. We
provide tested modules from reliable vendors with reliable chips.
5.3.3 DIMM Module Installation
5-6
Step 1.
Use of an ESD grounding strap is highly recommended.
Step 2.
Remove the controller module. (See previous section for
details).
Step 3.
Remove the BBU module, if installed. Carefully place the
module for it contains Li-ion batteries. Do not drop it to the floor
or place it near any heat source.
Replacing or Upgrading Memory Modules