OA57119: UNDERALLOCATION WHEN EXTENDING A DATA SET TO A NEW VOLUME WHERE THE VOLUME DOES NOT HAVE SUFFICIENT SPACE TO SATISFY THE REQUEST

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• User is attempting to create and allocate a data set using
  SPACE=(CYL,(1,4000)).  Storage group has two volumes, TESTMY and
  TESTMZ with 1310 and 1325 cylinders available, respectively.
  Space Constraint Relief is set to YES and REDUCE SPACE UP to is
  10%.
  The job runs, creates the data set with
  1 cylinder on TESTMY then begins writing data to the data set.
  EXTEND is done and 4000 cylinders are requested on TESTMY which
  fails in DADSM with DIAG 041A014D.  The allocation is redriven
  to TESTMZ where 1325 cylinders are allocated.  SMS accepts this
  allocation causing an underallocation on the second volume.
  The allocation should fail with MSGIGD17273I since there
  is not enough cylinders on either volume.
  The result is an underallocation when extending to a new volume
  when the volume(s) do not have sufficient space.
  

Local fix

• reduce the space required or add more volumes to the storage
  group with sufficient space
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  *  HDZ2220 USERS AND ABOVE                                     *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  *  SEE ERROR DESCRIPTION                                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
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  SUMMARY: WHEN EXTENDING A NON-VSAM DATA SET TO A NEW VOLUME, A
  SECONDARY SPACE AMOUNT IS USED. AFTER THE ALLOCATION FAILED
  BECAUSE OF INSUFFICIENT SPACE ON THE NEW VOLUME, SMS WOULD
  REDRIVE THE ALLOCATION IF SPACE CONSTRAINT RELIEF IS SET TO YES.
  
  HOWEVER, AFTER THE SPACE WAS ALLOCATED FOR SPACE CONSTRAINT
  RELIEF PHASE, SMS COMPARED THE ALLOCATED SPACE WITH THE
  PRIMARY SPACE AMOUNT, WHICH WAS A WRONG CHECK. THIS CAUSED THE
  UNDER-ALLOCATION OCCURED ON THE NEW VOLUME.
  

Problem conclusion

• THE LOGIC HAS BEEN CORRECTED TO CHECK THE SECONDARY SPACE AMOUNT
  WHEN EXTENDING A NON-VSAM DATA SET TO A NEW VOLUME.
  

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:

  UA99109 UA99110

Modules/Macros

• IGDVTSDA
  

Fix information

• Fixed component name

  STORAGE MGMT SU

• Fixed component ID

  5695DF101

Applicable component levels

• R230 PSY UA99109

     UP19/05/11 P F905

• R220 PSY UA99110

     UP19/05/11 P F905

Fix is available

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