Restoring VSAM data sets with expiration date of 1999365 (OW00780)

Prior to the fix of APAR OW00780, DFSMSdss sometimes mishandled VSAM expiration dates during logical data set DUMP and RESTORE operations. Non-SMS VSAM data sets that had an expiration date of 1999365 were dumped and restored with no expiration date (an expiration date of 0000000).

The byte at offset X'1B' of module ADRPATCH has been defined to allow special processing for VSAM data sets with an expiration date of 1999365 that were dumped without the fix for OW00780. The possible settings for the flag byte are listed below:

X'00': Non-SMS VSAM data sets that had an expiration date of 1999365 and that were dumped without the fix for OW00780 are restored with no expiration date.
X'FF': Any non-SMS VSAM data set that had an expiration date of 1999365 and that was dumped without the fix for OW00780 are restored with an expiration date of 1999365. However, non-SMS VSAM data sets that originally had no expiration date are also restored with an expiration date of 1999365.

Note: This flag byte should only be used when restoring VSAM data sets dumped without the APAR OW00780 fix and with an expiration date of 1999365.

To set the flag to on dynamically, use the SET PATCH command. To set the flag to on permanently, modify the sample JCL (see Sample JCL) as follows:

//SYSIN DD *
   NAME ADRDSSU ADRPATCH
   VER   1B        00
   REP   1B        FF