Isolating problems using AIX and Linux

• Related concepts
• General problem resolution
  Use this procedure to exchange the FRUs in the order of their failure probability.
• Storage I/O card modes and jumpers
• Hot-Swap FRU problem resolution
  Use this procedure to exchange hot-swappable field replaceable units (FRUs).
• MAP 0020: Problem determination procedure
  Use this MAP to get a service request number (SRN) if the customer or a previous MAP provided none.
• MAP 0050: SCSI bus problems
  Use this MAP to analyze problems with a SCSI bus.
• MAP 0054: PCI-X SCSI Bus Problems
  Use this MAP to determine which FRUs may need to be replaced in order to solve a SCSI bus-related problem on a PCI-X SCSI or PCI-X SCSI RAID adapter.
• MAP 0070: 888 sequence in operator panel display
  Use this MAP when you receive an 888 sequence on the operator panel display or monitor.
• MAP 0230: Platform error problem resolution
  Use this MAP to resolve problems reported by SRNs A00-xxx to A25-xxxx.
• MAP 0260: System hangs during resource configuration
  Use this MAP when the system unit hangs while configuring a resource.
• MAP 0270: SCSI RAID problem resolution and verification
  Use this MAP to resolve SCSI RAID adapter, cache, or drive problems.
• MAP 0285: Multipath I/O (MPIO) Problem Resolution
  Use this MAP to handle SRN A23-001 and ssss-640 (where ssss is the 3 or 4 digit FFC of an SCSD drive) to check the path from adapter to device.
• MAP 0291: Missing Device or Bus Problem Resolution
  Use this MAP when a bus or device (such as a disk drive) is reported as a missing resource by the diagnostics.
• PFW1542: I/O problem isolation procedure
  This I/O problem-determination procedure isolates I/O card and I/O subsystem failures. When I/O problem isolation is complete, all cables and cards that are failing will have been replaced or reseated.
• PFW1548: Memory and processor subsystem problem isolation procedure
  Use this problem isolation procedure to aid in solving memory and processor problems that are not found by normal diagnostics.

• Related tasks
• Problems with loading and starting the operating system (AIX and Linux)
  If the system is running partitions from partition standby (LPAR), the following procedure addresses the problem in which one partition will not boot AIX^(R) or Linux^(R) while other partitions boot successfully and run the operating system successfully.
• SCSI service hints
  Use one or more of the following procedures when servicing SCSI adapter or devices.

• Related reference
• MAP 0040: Intermittent Problem Isolation
  This MAP provides a structured way of analyzing intermittent problems.
• MAP 0030: Additional Problem Determination
  This MAP is used for problems that still occur after all FRUs indicated by the SRN or error code have been exchanged.
• MAP 0280: Console and Keyboard Problem Resolution
  Use this MAP to resolve console and keyboard problems when the system is booting.
• PFW1540: Problem isolation procedures
  The PFW1540 procedures are used to locate problems in the processor subsystem or I/O subsystem(s).