Attention: Do not start a system dump if the flashing 888 number shows in your operator panel display. This number indicates your system has already created a system dump and written the information to your primary dump device. If you start your own dump before copying the information in your dump device, your new dump will overwrite the existing information. Follow the procedures in Chapter 2, "888 in the Operator Panel Display," of the AIX Version 4.3 Messages Guide and Reference to record the message encoded as a sequence of operator panel display values. Refer also to "Check the Status of a System Dump".
A user-initiated dump is different from a dump initiated by an unexpected system halt because the user can designate which dump device to use. When the system halts unexpectedly, a system dump is initiated automatically to the primary dump device.
You can start a system dump by using one of the methods listed below.
If you have the Software Service Aids Package installed (see "Software Service Aids Package" for more information), you have access to the sysdumpstartcommand and can start a dump using one of these methods:
If you do not have the Software Services Aids Package installed, you must use one of these methods to start a dump:
Use the following steps to choose a dump device, initiate the system dump, and determine the status of the system dump:
Note: You must have root user authority to start a dump by using the sysdumpstart command.
This command lists the current dump devices. You can use the sysdumpdev command to change device assignments.
This command starts a system dump on the default primary dump device. You can use the -s flag to specify the secondary dump device.
Use the following SMIT commands to choose a dump device and start the system dump:
Note: You must have root user authority to start a dump using SMIT. SMIT uses the sysdumpstart command to start a system dump.
Start a Dump to the Primary Dump Device
Start a Dump to the Secondary Dump Device
Base your decision on the list of devices you made in step 2.
Note: To start a dump with the reset button or a key sequence you must have the key switch, or mode switch, in the Service position, or have set the Always Allow System Dump value to true. To do this:
This is essential on systems that do not have a mode switch.
Start a system dump with the Reset button by doing the following (this procedure works for all system configurations and will work in circumstances where other methods for starting a dump will not):
Your system writes the dump information to the primary dump device.
Start a system dump with special key sequences by doing the following:
Go back to System Dump Facility.
Note: You can start a system dump by this method ONLY on the native keyboard.