Specifications

Operator Panel
The following diagram shows the locations of the operator panel display and the
operator panel pushbuttons.
R
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8910
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1 Power-On Button 7 Speaker
2 Power-On LED (Green) 8 Serial Number Plate
3 System Attention LED (Yellow) 9 Reset Icon
4 SCSI Activity LED (Green) 10 Reset Button
5 LAN Activity LED (Green) 11 Service Processor Reset Button
6 Operator Panel Display
Note: The service processor reset button must be activated very carefully. An insulated
paper clip is recommended. Unbend the clip so that it has a straight section
about two inches long. Insert the clip straight into the hole, keeping the clip
perpendicular to the plastic bezel. When you engage the reset switch, you
should feel the detent of the switch. After you press the switch, the service
processor resets and then shuts down the system.
System Memory
Two slots are available for memory riser cards. Each riser card had 16 sockets. See
“System Board” on page 14, which illustrates the positions of the memory riser cards in
the system.
Four sizes of DIMMs are available: 128 MB, 256 MB, 512 MB, and 1 GB. Certain 32
MB DIMMs from older RS/6000 systems can also be used when upgrading system
memory.
One-Way Processor Memory Placement Rules
The rules for one-way processor memory are as follows:
v Minimum memory is 1 pair of DIMMs in slots 1 and 8 (see “Processor Card Memory
DIMM Locations for Service Processor Menus” on page 263).
v Maximum memory is 4 DIMM pairs in slots 1 through 8 (see “Processor Card
Memory DIMM Locations for Service Processor Menus” on page 263).
v Each memory riser slot must have a memory filler card installed.
Chapter 1. Reference Information 15