Definition of 0P21


Cause: Unit check (no record found or missing address markers), or
Home address or record 0 cannot be found on the track.
This is probably a hardware error.
Programmer Action: none.
Operator Action: See Figure 4 at the beginning of this section. If possible, use a different
disk pack or disk drive if the job must be rerun. If a different disk drive is used and the failure
recurs, the disk pack must be re-initialized and the file rebuilt.
If the problem persists, issue the ROD command and execute EREP (see DOS/VS SADP), and
have the
· output
· log sheet
available for problem determination.

Used with Courtesy and Permission of International Business Machines, Inc.