Fujitsu D2860 Technical Manual page 20

Main memory
All channels in a system will run at the fastest common frequency.
Can run with differently rated DIMMs and use the settings of the slowest
DIMM within a channel.
Timings other than frequency can vary between channels.
Mirrored channel mode
1. Upgrade
Figure 4: Mirrored channel mode
In figure 4 you can see the slots that must be populated for a minimum config-
uration and for the first upgrade.
In this mode channel A and channel B are exact copies of each other.
Channel A and channel B must be populated identically (channel C is not
usable in this mode).
Memory slot populations within a channel do not have to be identical but the
same memory slot location across channel A and B must be populated the
same way.
20
Memory Configuration (Mirrored Mode)
DIMM 1F
DIMM 1E
DIMM 1D
CPU 2
CPU 1
DIMM 2A
DIMM 1A
DIMM 2B
DIMM 1B
DIMM 2C
DIMM 1F
DIMM 1E
DIMM 1D
CPU 2
CPU 1
DIMM 2A
DIMM 1A
DIMM 2B
DIMM 1B
DIMM 2C
Technical Manual
Channel F
Channel E
Channel D
Channel A
Channel B
Channel C
DIMM 1C
Channel F
Channel E
Channel D
Channel A
Channel B
Channel C
DIMM 1C
Features
D2860 (BX920)