3-14
Sun Netra X4450 Server Service Manual • August 2008
3.5
Replacing FB-DIMMs
Use the FB-DIMM configuration rules to help you plan the memory configuration of
your server. There are 32 slots that hold industry-standard FB-DIMM memory
modules. General rules are:
■
FB-DIMMs must be installed in identical pairs (that is, the same size, speed, and
organization).
■
A replacement FB-DIMM must have the same part number as the other FB-DIMM
in its pair. If you are unable to obtain a matching FB-DIMM, you must replace
both FB-DIMMs in the pair.
■
FB-DIMM pairs must be installed in the following slot order: A0/B0, C0/D0,
A1/B1, then C1/D1.
■
FB-DIMM capacities can be different between slots. For example, you can install a
pair of 2-GB FB-DIMMs in slots A0 or B0 and a pair of 1-GB FB-DIMMs in slots
C0 or D0.
■
Highest capacity FB-DIMMs must be installed in the lowest numbered slots. For
instance, if you have four 4-GB FB-DIMMs and four 2-GB FB-DIMMs, you must
install the 4-GB FB-DIMMs in slots A0/B0 and C0/D0, and you must install the
2-GB FB-DIMMs in slots A1/B1 and C1/D1.
Caution –
Ensure that all power is removed from the server before removing or
installing FB-DIMMs. You must disconnect the power cables before performing this
procedure.