
System/Processor Board Replacement
When replacing the system board, make sure jumpers,
cables, adapter cards, and processor board are installed
and seated correctly on the new system board.
The PC Server 325 Type 8639 computer might have two
processors, and other components installed on the
processor board. When replacing the processor board,
remove all of the installed components from the old
processor board and install them on the new processor
board. If the problem remains, check the following:
The processor is installed and seated correctly in
socket (U5) on the processor board.
If installed, the optional processor is seated correctly
in socket (U6) on the processor board.
All other components removed from the old processor
board or system board are installed and seated
correctly on the new board.
Note
If the processor(s) are not seated correctly,
intermittent problems can occur.
Symmetric
Multiprocessors/Multiprocessing
The PC Server 325 Type 8639 has a second upgradeable
processor socket on the processor board to support
Symmetric Multiprocessors/Multiprocessing (SMP). The
SMP capability extends processing performance by
allowing tasks to be dispatched to the next available
processor rather then being queued until the busy
processor has completed its task. The SMP capability also
provides a level of high availability in that some operating
systems run in a uni-processor mode if one of the
processors should experience a failure. This function will
allow the LAN to continue operation so that service can be
scheduled at a non-critical time.
Note
If the optional processor is installed, the optional
processor is the boot processor.
PC Server 325 - Type 8639
87
Summary of Contents for 325 8639
Page 97: ...Drawer Model Rails Drives 92 PC Server HMM ...
Page 102: ...Operator Panel and Cable Note Loosen do not remove screw Screw PC Server 325 Type 8639 97 ...
Page 108: ...System Board Note Note A black square indicates pin 1 PC Server 325 Type 8639 103 ...
Page 120: ...Parts Listings 1 2 3 4 5 6 7 8 9 10 12 11 13 14 15 16 17 18 20 19 PC Server 325 Type 8639 115 ...
Page 121: ...21 23 24 25 22 26 27 28 29 30 116 PC Server HMM ...
Page 129: ...124 PC Server HMM ...
Page 145: ...IBM Part Number 84H3049 Printed in U S A S84H 3ð49 ðð ...