gtpo1m0fOperations

Manual Dumps

There are two ways to start a manual dump:

  1. Enter the ZDUMP command
  2. Perform a system restart from the CPU console.

Method 1 has the advantage of being noncatastrophic but has the disadvantage of using some main storage blocks that may contain information relevant to the problem. Therefore, this method is more commonly used in a test environment to take a snapshot dump after a test.

Method 2 is more commonly used in an operational environment whenever the system must be IPLed. Although it starts a catastrophic dump, a software IPL follows automatically, if possible, with the added advantage of a system reset (to clear the channels).

Method 2 is used if: