IBM RS/6000 SP, Maintenance Information

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MAP 0190: Processor Node Function
MAP 0190: Processor Node Function
001
Attention: The processor node(s) must be removed from active configuration before continuing. If
processor node(s) is/are off, continue; otherwise, ask customers to initiate shutdown procedure and
power-off processor node(s) from the control workstation, or defer maintenance until all jobs are com-
pleted. Powering off a processor node(s) in a parallel environment will cause all jobs to flush from the
queue and switch initialization to rerun.
Attention: Servicing a processor node with the High Performance Switch (HiPS) feature or Scalable
POWERparallel Switch (SPS) feature installed, will impact the entire switch network, unless the processor
node has already been powered off (or fenced) and/or the switch data cable has been disconnected.
Refer to "Service Position Procedures" in
IBM RS/6000 SP: Maintenance Information, Volume 3, Locations
and Service Procedures for placing or removing processor node(s) in/from service position.
Refer to "Viewing Switch Partitions" in
IBM RS/6000 SP: Maintenance Information, Volume 3, Locations
and Service Procedures for locating and fencing/unfencing nodes within a switch partition.
Open the TTY to the failing node. Real-time error data can be observed that can help with problem deter-
mination and repair.
Processor problem detected by RS/6000 logic.
– From the system monitor on the control workstation or from Perspectives, obtain processor node front
display.
Ÿ Check 3-digit LEDs from the processor node front panel display.
Ÿ
If the LEDs display flashing ‘888’:
– For thin and wide processor nodes, click on “RESET” button to read any sequence of
numbers that follow; repeat RESET/read LEDs until LEDs display ‘888’ again.
– For 604 or 604e high processor nodes, record values displayed after the ‘888’. If you see ‘---’
(three dashes), look at the 3-digit display. (Choose the 3-digit display from the “All Node
Summary Display.”)
– For 332 MHz SMP or POWER3 SMP nodes, use mouse button 3 on the 3-digit display for
additional information.
– For SP-attached servers, use mouse button 3 on the 3-digit display for additional information.
– Record the LED value or sequence for reference.
– Power off and power on processor node from the control workstation.
Are any different 8-digit LED values displayed during node power on or power off?
Yes No
002
Does processor node completely IPL?
Yes No
003
– Go to Step 008 on page 1-88.
004
– Check record of this processor node to see if it experiences excessive fails (more than one per
week).
(Step 004 continues)
Chapter 1. Maintenance Analysis Procedures (MAPs)
1-87