Sun Microsystems Netra 440, Руководство по обслуживанию

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82 Netra 440 Server Service Manual • August 2004
Caution – DIMMs are made of electronic components that are extremely sensitive
to static electricity. Static electricity from your clothes or work environment can
destroy the DIMM. Do not remove a DIMM from its antistatic packaging until you
are ready to install it on the CPU/memory module. Handle the DIMM only by its
edges. Do not touch the components or any metal part. Always wear an antistatic
grounding strap when you handle the DIMM. For more information, see
“Avoiding
Electrostatic Discharge” on page 32 .
Memory Interleaving
You can maximize the system’s memory bandwidth by taking advantage of its
memory interleaving capabilities. The Netra 440 server supports two-way
interleaving. In most cases, higher interleaving results in improved system
performance. However, actual performance results can vary depending on the
system application. Two-way interleaving occurs automatically in any DIMM bank
where the DIMM capacities in DIMM group 1 do not match the capacities used in a
DIMM group 2. For optimum performance, install identical DIMMs in all four slots
in a CPU/memory module.
Keep the following points in mind when removing or installing a memory module:
■
DIMMs must be added in pairs within the same group of DIMM slots; adjacent
slots belong to the same DIMM group.
■
Each group used must have two identical DIMMs installed—that is, both DIMMs
must be from the same manufacturing vendor and must have the same capacity
(for example, two 512-Mbyte DIMMs or two 1-Gbyte DIMMs).
Note – If DIMMs of different densities and speeds are installed as a pair, both
DIMMs will operate at the lower density and slower speed.
The part numbers for the memory modules are:
■
1 GB memory (2 x 512 MB DIMMs)—F370-4939, X7403A
■
2 GB memory (2 x 1 GB DIMMs)—F370-4940, X7404A