PI71224: UNWARRANTED GEO020E DEVICE SIZE MISMATCH DETECTED

APAR status

• Closed as fixed if next.

Error description

• GDPS device size checking may encounter unwarranted GEO020E
  errors for 'Device Size mismatch detected', indicating that
  the listed devices do not have the same number of cylinders.
  This can occur if GDPS is unable to determine the correct
  size of a device from the device class extension (DCE)
  control block.
  

Local fix

• Rebuild the DCE control blocks for the reported devices in
  one of the following ways:
  - Issue MVS command DEVSERV QDASD,sdddd,nn,VALIDATE
    for the reported devices.
  - Issue MVS command F ANTAS000,REDISCOVER
    This will rebuild DCE data for all offline devices.
  - If APAR OA43706 is installed, the ANTXIN00 parmlib
    member can be updated to use STARTUP OfflineDiscovery(YES)
    This will build DCE data for offline devices after IPL.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: GDPS/PPRC GDPS/MTMM GDPS/HM GDPS/GM          *
  ****************************************************************
  * PROBLEM DESCRIPTION: Unwarranted GDPS message GEO020E        *
  *                      'device size mismatch' detected         *
  *                      when DCE information is missing         *
  *                      or incorrect.                           *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

Temporary fix

Comments

• Resolved in GDPS V3R14
  

APAR Information

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

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

Fix information

Applicable component levels

• R3BC PSN

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