Sun Microsystems Fire 880, Owner'S Manual

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66 Sun Fire 880 Server Owner’s Guide • August 2001
The following table shows the association between the CPUs and their
corresponding DIMM groups.
Configuration Rules
■
DIMMs must be added four-at-a-time within the same group of DIMM slots;
every fourth slot belongs to the same DIMM group.
■
Each group used must have four identical DIMMs installed—that is, all four
DIMMs must be from the same manufacturing vendor and must have the same
capacity (for example, four 128-Mbyte DIMMs, four 256-Mbyte DIMMs, or four
512-Mbyte DIMMs).
■
Each CPU/Memory board must be populated with a minimum of eight DIMMs,
installed in groups A0 and B0.
Note –
All internal options (except disk drives and power supplies) must be
installed only by qualified service personnel. For information about installing or
removing DIMMs, see the
Sun Fire 880 Server Service Manual , which is included on
the Sun Fire 880 Documentation CD .
Caution –
DIMMs are made of electronic components that are extremely sensitive
to static electricity. Static from your clothes or work environment can destroy the
modules. Do not remove a DIMM from its antistatic packaging until you are ready to
install it on the system board. Handle the modules only by their edges. Do not touch
the components or any metal parts. Always wear an antistatic grounding strap when
you handle the modules. For more information, see “How to Avoid Electrostatic
Discharge” on page 31.
CPU Number CPU/Memory Slot Associated DIMM Groups
CPU 0 Slot A A0, A1
CPU 2 Slot A B0, B1
CPU 1 Slot B A0, A1
CPU 3 Slot B B0, B1
CPU 4 Slot C A0, A1
CPU 6 Slot C B0, B1
CPU 5 Slot D A0, A1
CPU 7 Slot D B0, B1