iSeries Server 270
120 iSeries Handbook
Main Storage
All main storage on the Model 270 is feature main storage.
• Processors #2431 and #2432:
– A single main storage DIMM is allowed on these processors.
– Any additional DIMMs must be added in pairs of the same capacity and technology.
– The DIMM memory features used on these processors are unique to this processor
set and do not work on any other Model 270 processor.
– There are eight slots available in the base system for main storage DIMMs, which
plug directly onto the processor (direct attach)
• Processor #2434:
– A pair of main storage DIMMs is allowed on these processors.
– A minimum of four main storage DIMMs of the same capacity and technology must be
selected.
– This processor includes a base CCIN 2884 Memory Expansion Card. All main storage
DIMM features plug into this card.
– There are 16 slots available on this processor. Main storage DIMMs must be added in
sets of four (quads). Each DIMM in the set of four must be of the same capacity and
technology.
– All DIMMs must be plugged in quads starting from the outer four corners going toward
the center (A, B, C, D, then E, F, G, H, and so on). The exception is to allow a single
set of two main storage DIMMs if these are the only two on the system.
Using the same feature code number within a quad is required. Mixing quad “groups”
on the same riser card is also allowed (including mixing stacked (#3025) and
unstacked (#3024) memory technology).
Power and Packaging
The iSeries server 270 does not include an internal battery. An external UPS is
recommended to protect the system unit and any external components against utility power
outages. The AS/400e CPM/UPS Models 9910-080, 9910-140, and 9910-180, which were
previously used with the 9406 Model 170, can also be used with the iSeries server 270. An
external UPS, combined with abnormal IPL improvements in OS/400, can provide an
equivalent level of power protection and fast recovery in the event of power failure.
Continuously Powered Mainstore (CPM) is not supported on the iSeries server 270.
The supported power and packaging features for the iSeries server 270 are:
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