D-Link DSN-1100-10 Hardware Reference Guide for DSN-1100-10 Valid for fir - Page 33

Table A-1. xStack Storage Array DIMM Specifications Requirement PC2700/DDR333 speed ECC X8 RAMs Registered Buffered Organization DIMM 0 (J15) System Memory Module 256MB 256MB 512MB 512MB Description SDRAMs must be JEDEC compliant and DDR333 capable, with a CAS latency of 2.5. PC2100/DDR400 speed DIMMs can be used if they support a 2.5 CAS latency when operating at DDR333 speed. DIMMs must be organized as x72 bits wide, allowing support for ECC. DIMMs must use 8-bit wide DRAMs that can support data mask (DM) signals. DIMMs that use 4-bit-wide DRAMs do not provide DM signals and cannot be used. DIMMs must be registered as per the JEDEC specification for registered DIMMs. DIMMs must be buffered as per the JEDEC specification for buffered DIMMs. Conforming DIMM organizations are shown in Table A-2.. Table A-2. DIMM Organization Total System Memory 256MB 256MB 512MB 512MB DIMM 1 (J14) Buffer / Cache Memory Module Total Buffer / Cache Memory 256MB 256MB 512MB 512MB 512MB 512MB 1GB 1GB Total Memory 512MB 768MB 1GB 1.5GB To upgrade or replace memory, use the following procedure. 1. Power down the DSN-1100 storage system and remove the power cord from the back panel. 2. Attach an ESD-preventive wrist strap. 3. Open the enclosure to access the DSN-1100 storage system Controller (see section A.1). 4. Remove all five drive trays from the system and look down at the controller board as shown in figure A-10. Be sure to orient the rear of the system to your left as shown. 5. Locate the DIMM socket where you will be removing or installing the DIMM (see Figure A10, A-11 and A-12). 6. To remove a DIMM, carefully push the socket latches found on either side of the DIMM socket, then pull the DIMM out of the socket (see Figure A-13). The latches hold the DIMM tightly, so be careful not to break the socket. DSN-1100 Hardware Reference Guide 33