The zsnap command is a supplemental tool used by AIX support personnel to gather debugging data. Built around the standard AIX snap command, the zsnap command gathers additional information that the snap command does not provide. You can also use the zsnap command to send a testcase directly to IBM from the machine that generated the testcase data. If needed, the zsnap command can fork multiple calls to the snap command, which results in quicker data gathering than if done via snap.
zsnap Utility for AIX http://www-01.ibm.com/support/docview.wss?uid=isg3T4000034