Recovering from a failure

The operator needs to recover if a failure occurs.

If the kernel fails, both interactive processing in the shell and z/OS UNIX applications fail.
If a file system type fails, z/OS UNIX continues processing even though the file system type is not operational. Requests to use the files in any file systems of that file system type will fail.
If a file system fails, programs might fail because some files cannot be used.

The operator starts recovery by collecting messages and a dump, if written.