Specifications

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. Only
qualified engineers should replace the DIMM module.
• Removing the DIMM module while it contains cached data and when the BBU is
still attached to the controller can damage the DIMM module. When the
controller is removed from chassis, the BBU will start to discharge supplying
power to memory. Removing the DIMM module while it is being powered by the
BBU will damage the DIMM module.
Therefore, install a BBU module after you replace a DIMM module if you prefer
using a different DIMM module.
2.6.2 Selecting the Memory Modules
If the memory module on the 24 BAY controller is going to be replaced, the
following factors must be considered when purchasing replacement DIMM modules:
 Pre-installed DDR DIMM: The subsystem comes with a 256MB DDR RAM DIMM
module pre-installed on the controller board. If you wish to change the size of the
DIMM module, then a new, separately purchased DIMM must be installed.
 DDR DIMM modules supported: The subsystem supports DDR RAM DIMM
modules with memory capacities from 256MB to 2GB.
 Installation considerations: When installing the DIMM module, it is necessary to
handle the controller module. The controller board is more susceptible to damage
than the other components and must therefore be handled with extreme care. ALL
anti-static precautions specified in Section 2.3 must be strictly adhered to.
 Secure installation: When replacing the DIMM module, make sure that the new
DIMM module is firmly in place prior to installing the controller module. If the
DIMM module is not firmly in place, the subsystem will not run and the controller
will need to be removed and the DIMM module correctly installed.
 Purchasing considerations: When purchasing a DDR DIMM to install on the
controller board, contact your system vendor for an adequate module.
2-6
Memory Module Installation