4. EXCEPTIONS › 4.3 Detailed Exception Descriptions › 00312: Page/Swap I/O Error(s)

00312: Page/Swap I/O Error(s)

FILE              TSO System Activity
SAS FILE NAME     DETAIL.TSOTSO01
SOURCE LOCATION   sharedprefix.MICS.SOURCE(DYTSOEXC)

SEVERITY          Critical      (SEVERITY='C')
MANAGEMENT AREA   Availability  (MGMTAREA='AVAILABILITY')

PURPOSE      Indicates hardware problems in the page/swap
             subsystem.

RATIONALE    The integrity of data moving to and from MVS's
             paging and swapping data sets is of vital
             concern from both a performance and a
             reliability point of view.  Whether or not
             either are actually impacted and by how much
             depend on the nature, frequency, and location
             of the errors.  (For example, a permanent I/O
             error on a page write is not fatal--ASM marks
             the slot as "bad" and tries another.  On the
             other hand, a failure to read a page needed for
             the IMS control region's private area would be
             fatal to online data base processing).

DEFINITION   This exception is noted when the data element
             TSOXPAGY (Intvls When I/O Errors on Paging Ops)
             is found with a nonzero value.  See Appendix B
             for more information on this data element.

EXCEPTION    The SAS statements identifying the exception
STATEMENTS   situation and describing the condition are
             stored in the source member named in SOURCE
             LOCATION and are described below:

************************************************************;
*
** 00312
** PAGE/SWAP I/O ERROR(S)
*;
IF TSOXPAGY > 0
 THEN DO;
  EXCCODE='00312'; SEVERITY='C'; MGMTAREA='AVAILABILITY';
  EXCDESC1='PAGE/SWAP I/O ERROR(S)';
  EXCDESC2=' ENDTS=' || PUT(ENDTS,DATETIME19.2);
  LINK HIT;
END;

THRESHOLD    None required.
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