OA07768: NEW FUNCTION - ALLOW WORM TAPES FOR DFSMSHSM FUNCTIONS

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• New Function
  New Function to allow the use of
  WORM tapes for all DFSMShsm functions.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All z/OS V1R3 through V1R7 users of          *
  *                 DFSMShsm who also use D/T3592 tape drives.   *
  ****************************************************************
  * PROBLEM DESCRIPTION: Allow the use of                        *
  *                      WORM tapes for all DFSMShsm functions.  *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Some customers want to use WORM tape with DFSMShsm functions
  other than ABARS even though HSM does not provide
  any specific considerations for WORM tape with those functions.
  

Problem conclusion

Temporary fix

Comments

• By default DFSMShsm will only allow WORM tape to be used as
  ABACKUP target tape.  This support allows all DFSMShsm tape
  functions to use WORM tape.  It can be enabled via:
  
  PATCH .MCVT.+286 BITS(1.......)
  
  and disabled (the default) via:
  
  PATCH .MCVT.+286 BITS(0.......)
  
  Although IBM has tested the use of WORM tape with the various
  DFSMShsm functions, it is up to the user to decide if using
  WORM tape with DFSMShsm functions is appropriate.  These
  functions were not designed to be archival and so have some
  limitations users should consider before implementing them.
  
  Since the support is passive, HSM treats WORM tapes the same
  way it treats R/W tapes.
  Migration allows recall with subsequent re-migration of
  data sets using the same data set names.  Even though the
  original form of a data set remains on tape, only the last
  version will be known to DFSMShsm.
  
  Data sets on tape tend to move from one tape volume to another
  via the Recycle function.  If Recycle is allowed, there is no
  guaranteed relationship between a data set and a tape volser.
  DFSMShsm does not inherently split a function's data between
  different tape media types.  The user must manage this.
  
  If DFSMShsm is patched to use WORM tapes and then later patched
  to not use WORM tapes, mark all of the WORM tapes full so they
  are not selected for output.  Any usage of WORM tapes for
  output in an HSM not patched to use them will generally result
  in failure.
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UA21480 UA21481 UA21482 UA21483

Modules/Macros

•    ARCALVOL ARCATIO  ARCCPCTP ARCCPCTS ARCCVT
  ARCDTVSV ARCRSTR  ARCSCANV ARCTOPEN ARCTVSV  ARCWCMI  ARCWCVT
  ARCWOPEN ARCYQE   ARCYVOLA ARCZAL2V ARCZDCUC ARCZDTLC ARCZPVLD
  ARCZTMVT
  

Fix information

• Fixed component name

  DFSMS/MVS HSM

• Fixed component ID

  5695DF170

Applicable component levels

• R1G0 PSY UA21480

     UP05/10/25 P F510

• R1H0 PSY UA21481

     UP05/10/25 P F510

• R1J0 PSY UA21482

     UP05/10/25 P F510

Fix is available

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