IBM OS/390 User Manual

Page of 673
Item G023729
Last updated....: 10/13/1997
Abstract........: WSC FLASH 9741
VSAM CATALOG AND CVOL SUPPORT ENDS IN YR2000
Access to an MVS or OS/390 non-ICF VSAM catalog or CVOL will
not be possible after 1999.
The following text was taken from the DFSMS/MVS 1.4 availability
announcement made on June 6, 1997 (297-192):
NOTE: On October 31, 1995, IBM announced Year 2000 Support
which stated that, for any S/390 platform running MVS or OS/390 to be
considered as Year 2000 Ready, all data sets must use Integrated Catalog
Facility (ICF).
It will not be possible to access data via a VSAM Catalog or CVOL
when the system date changes past December 31, 1999.
This means that MVS customers who still have data sets cataloged
in OS/VS Control Volumes (CVOLs) or in the old VSAM catalogs
will need to migrate these to ICF catalogs before the end of 1999.
We look forward to all of our MVS customers taking advantage of the
better performance and integrity of ICF. Those VSE VSAM customers who
previously shared VSAM data sets between the MVS platform and VSE or VM
platforms will need to reevaluate methods for satisfying their data
sharing requirements. For further information, refer to Software
Announcement 295-464.
APARs OW25632 and OW25988 and their associated PTFs have been written
to assist customers in determining whether or not they are accessing
VSAM catalogs. The APARs add two new reason codes to message IEC331I
return code 4:
″33 
- Explanation: A VSAM catalog has been opened for use by the
catalog address space. The usage is accepted.
Programmer Response: VSAM catalogs may not be opened as catalogs
beginning 1/1/2000. This message is provided to simplify identifying
whether any VSAM catalogs are still in use. They should be converted to
ICF catalogs as soon as possible.
Figure 8 (Part 1 of 2). Extract f r o m WSC Flash 9741
Chapter 5. Disk and Tape Storage Considerations
113