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Linux fast-path problem isolation

Use this information to help you isolate a hardware problem when using the Linux operating system.

Notes:
  1. If the server or partition has an external SCSI disk drive enclosure attached and you have not been able to find a reference code or other symptom, go to MAP 2010: 7031-D24 or 7031-T24 start
  2. If you are servicing an SP system, go to the Start of Call MAP 100 in the SP System Service Guide.
  3. If you are servicing a clustered server, go to the Start of Call MAP 100 in the Clustered Installation and Service Guide.
  4. If you are servicing a clustered server that has InfiniBand switch networks, go to IBM® Clusters with the InfiniBand Switch.

Linux fast path table

Locate the problem in the following table and then go to the action indicated for the problem.

Symptoms Action
You have an eight-digit reference code.

Go to Reference codes, and do the listed action for the eight-digit reference code.
You are trying to isolate a problem on a Linux server or a partition that is running Linux operating system.
Note: This procedure is used to help display an eight-digit reference code using system log information. Before using this procedure, if you are having a problem with a media device such as a tape or DVD-ROM drive, continue through this table and follow the actions for the appropriate device.
Go to Linux problem isolation procedure.
You suspect a problem with your server but you do not have any specific symptom.

Go to MAP 0020: Problem determination procedure for problem determination procedures.
You need to run the eServer™ standalone diagnostics

Go to AIX® and Linux diagnostics and service aids
SRNs
You have an SRN.

Look up the SRN in the Service request numbers and do the listed action.
An SRN is displayed when running the eServer standalone diagnostics.
  1. Record the SRN and location code.
  2. Look up the SRN in the Service request numbers and do the listed action.
Tape Drive Problems
You suspect a tape drive problem.
  1. Refer to the tape drive documentation and clean the tape drive.
  2. Refer to the tape drive documentation and do any listed problem determination procedures.
  3. Go to MAP 0020: Problem determination procedure for problem determination procedures.
Note: Information on tape cleaning and tape-problem determination is normally either in the tape drive operator guide or the system operator guide.
Optical Drive Problems
You suspect a optical drive problem.
  1. Refer to the optical documentation and do any listed problem determination procedures.
  2. Before servicing an optical drive ensure that it is not in use and that the power connector is correctly attached to the drive. If the load or unload operation does not function, replace the optical drive.
  3. Go to MAP 0020: Problem determination procedure for problem determination procedures.
Note: If the optical drive has its own user documentation, follow any problem determination for the optical drive.
SCSI Disk Drive Problems
You suspect a disk drive problem.

Disk problems are logged in the error log and are analyzed when the standalone disk diagnostics are run in problem determination mode. Problems are reported if the number of errors is above defined thresholds.

Go to MAP 0020: Problem determination procedure for problem determination procedures.
Diskette Drive Problems
You suspect a diskette drive problem.

Go to MAP 0020: Problem determination procedure for problem determination procedures.
Token-Ring Problems
You suspect a token-ring adapter or network problem.
  1. Check with the network administrator for known problems.
  2. Go to MAP 0020: Problem determination procedure for problem determination procedures.
Ethernet Problems
You suspect an Ethernet adapter or network problem.
  1. Check with the network administrator for known problems.
  2. Go to MAP 0020: Problem determination procedure for problem determination procedures.
Display Problems
You suspect a display problem.
  1. If your display is connected to a KVM switch, go to Troubleshooting the keyboard, video, and mouse (KVM) switch for the 1x8 and 2x8 console manager. If you are still having display problems after performing the KVM switch procedures, come back here and continue with step 2.
  2. If you are using a management console:
  3. If you are using a graphics display:
    1. Go to the problem determination procedures for the display.
    2. If you do not find a problem:
      • Replace the graphics display adapter. Refer to the remove and replace procedures for your specific system..
      • Replace the backplane into which the graphics display adapter is plugged. Refer to the remove and replace procedures for your specific system.
Keyboard or Mouse
You suspect a keyboard or mouse problem.

If your keyboard is connected to a KVM switch, go to Troubleshooting the keyboard, video, and mouse (KVM) switch for the 1x8 and 2x8 console manager. If you are still having keyboard problems after performing the KVM switch procedures, come back here and continue to the next paragraph.

Go to MAP 0020: Problem determination procedure for problem determination procedures.

If you are unable to run diagnostics because the system does not respond to the keyboard, replace the keyboard or system backplane.

Note: If the problem is with the keyboard it could be caused by the mouse device. To check, unplug the mouse and then recheck the keyboard. If the keyboard works, replace the mouse.
System Messages
A System Message is displayed.
  1. If the message describes the cause of the problem, attempt to correct it.
  2. Look for another symptom to use.
System Hangs or Loops When Running the OS or Diagnostics
The system hangs in the same application. Suspect the application. To check the system:
  1. Power off the system.
  2. Go to MAP 0020: Problem determination procedure for problem determination procedures.
  3. If an SRN is displayed at anytime, record the SRN and location code.
  4. Look up the SRN in the Service request numbers and do the listed action.
The system hangs in various applications.
  1. Power off the system.
  2. Go to MAP 0020: Problem determination procedure for problem determination procedures.
  3. If an SRN is displayed at anytime, record the SRN and location code.
  4. Look up the SRN in the Service request numbers and do the listed action.
The system hangs when running diagnostics. Replace the resource that is being tested.
Exchanged FRUs Did Not Fix the Problem
A FRU or FRUs you exchanged did not fix the problem.

Go to MAP 0020: Problem determination procedure for problem determination procedures.
RAID Problems
You suspect a problem with a RAID. A potential problem with a RAID adapter exists. Run diagnostics on the RAID adapter. Refer to the RAID Adapters User's Guide and Maintenance Information, refer to IBM eServer pSeries Information Center (http://publib16.boulder.ibm.com/pseries/en_US/infocenter/base).

If the RAID adapter is a PCI-X RAID adapter, refer to the PCI-X SCSI RAID Controller Reference Guide for AIX in the IBM eServer pSeries Information Center (http://publib16.boulder.ibm.com/pseries/en_US/infocenter/base).
SSA Problems
You suspect an SSA problem. A potential problem with an SSA adapter exists. Run diagnostics on the SSA adapter. If the system has external SSA drives, refer to the SSA Adapters User's Guide and Maintenance Information (IBM eServer pSeries Information Center (http://publib16.boulder.ibm.com/pseries/en_US/infocenter/base), or the service guide for your disk subsystem.
You Cannot Find the Symptom in This Table
All other problems.

Go to MAP 0020: Problem determination procedure for problem determination procedures.
Parent topic: Linux server or Linux partition symptoms

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Last updated: Tue, February 11, 2014