Fatal File System Error: zero First or Current Cluster.

Occurs on:  68, 86, and 286.  This is an Abend error.

Meaning:  This error would be generated when a process in the operating
          system attempts to extend an existing file and finds that the
          first or the current cluster number is zero.  A file's first
          and current cluster numbers point to the physical area on the
          disk that the file is located in.  These numbers can never be
          zero.  This is a consistency check to ensure the integrity of
          the file before the file is extended.  The occurrence of this
          error indicates that the file is potentially severely
          corrupted.

Cause:  This error could be caused by a memory failure in the file
        server and could be attributable to either a hardware failure or
        poor power line conditioning.  This could also be caused by a
        problem with the disk or related hardware.

Solution:  Reboot the file server.  Check the file server's memory and
           power line conditioning.  Check the disk and related hardware.