Two stand-alone dump tools are shipped with Linux on zSeries for generating system memory dumps:
DASD dump tool for dumps on DASD volumes
Tape dump tool for dumps on tape
When your Linux for zSeries completely crashes or hangs, the last thing you can do is to take a system memory dump and afterward inspect the dump to identify the problem. To inspect the dump, you can use lcrash the Linux crash dump analyzer. lcrash has a command-line interface with simple command-line editing, history mechanism, and command-line completion.