Initiating a DASD dump
You can initiate a dump from a DASD device.
Procedure
To obtain a dump with the DASD dump tool, perform the following main steps:
- Stop all CPUs.
- Store status on the IPL CPU.
- IPL the dump tool on the IPL CPU. Note: Do not clear storage!
The dump process can take several minutes depending on the device type you are using and the amount of system memory. After the dump completes, the IPL CPU should go into disabled wait.
The following PSW indicates that the dump process completed successfully:
Any other disabled wait PSW indicates an error.(64-bit) PSW: 00020000 80000000 00000000 00000000After the dump tool is IPLed, messages that indicate the progress of the dump are written to the console:Dumping 64 bit OS 00000032 / 00000256 MB 00000064 / 00000256 MB 00000096 / 00000256 MB 00000128 / 00000256 MB 00000160 / 00000256 MB 00000192 / 00000256 MB 00000224 / 00000256 MB 00000256 / 00000256 MB Dump successful
Results
You can IPL Linux again.
- z/VM guest example
In this example, a dump to DASD device 193 is initiated from z/VM. - Dumping an LPAR using the HMC or SE web interface example
In this example, an LPAR dump to a DASD device is initiated from an HMC (Hardware Management Console) or SE (Support Element). - Remote trigger example
You can trigger HMC or SE activities remotely by using the snipl command. - Automatic dump example
On both z/VM® and LPAR, you can use the dumpconf service to set up automatic dumping. In this example, a dump is automatically triggered when a kernel panic occurs.
Parent topic: Using a DASD dump device
Related tasks: