PJ40565: OUTAGE DUE TO TAPE ISSUE

APAR status

• Closed as program error.

Error description

• See Problem Summary.
  

Local fix

• na
  

Problem summary

• APAR NUMBER:  PJ40565
  PRODUCT:  z/TPF
  FUNCTIONAL AREA:  TAPE I/O AND ERROR RECOVERY
  SHIPPED IN PUT:  10
  
  ABSTRACT:
  CTL-64C00 error if dump tape becomes unavailable while writing
  data from the Dump Buffer Area.
  
  PACKAGE CONTENTS:
  Source Segments:
  (C) base/cp/cefe.cpy
  
  Object Only Binaries:
  None.
  
  Configuration Independent Binaries:
  None.
  
  Support Files:
  None.
  
  OTHER BINARIES TO BUILD: YES
  (C) <sys>/obj/cctape.o
  (C) <sys>/load/CPS0.so
  
  COMMENTS:
  If the dump tape becomes unavailable while TPF is attempting to
  write out the first record for a dump that is contained in the
  dump buffer area then the recovery may repeatedly attempt to
  write that record to tape. Each time the record is retried an
  ECB is created to send message COSK0399I informing the operator
  of which tape the dump is being written to. This will deplete
  the system of resources resulting in a catastrophic CTL-64C00
  dump.
  
  This behavior was caused because the SWB to write the DBA data
  was incorrectly classified when it was created.
  

Problem conclusion

• SOLUTION:
  The CVTOPERBLK routine in copy member CEFE of CCTAPE has been
  updated so that the DBA write will not be marked as a bypass
  aux queue SWB. This will prevent the DBA write from being
  repeatedly attempted if there is an error on the tape. TPF will
  now wait until the tape switch occurs before attempting the
  write again.
  
  COREQS: NO
  None.
  
  MIGRATION CONSIDERATIONS: NO
  None.
  
  BUILD COMMANDS AND INSTRUCTIONS: YES
  #maketpf commands for linux
  maketpf -f CPS0 cctape.o
  maketpf CPS0 link
  
  UPDATED INFORMATION UNITS: NO
  None.
  
  See your IBM representative if you need additional information.
  
  DOWNLOAD INSTRUCTIONS:
  http://www.ibm.com/software/htp/tpf/maint/maintztpf.html
  
  APAR URL:
  http://www.ibm.com/software/htp/tpf/ztpfmaint/put10/PJ40565.htm
  

Temporary fix

Comments

APAR Information

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

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

Fix information

• Fixed component name

  Z/TPF

• Fixed component ID

  5748T1501

Applicable component levels

• R110 PSY

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