I am formatting some new files and am getting errors relating to size.
IDMSBCF 18.5 CA IDMS Batch Command
CONNECT TO SYSTEM ;
Status = 0 SQLSTATE = 00000
FORMAT FILE ADDRSEG.ADR43;
Status = -4 SQLSTATE = 5000B Messages follow:
DB002252 C-4M352: Function WRITE DDname PHYADR43 - I/O error 12
Command Facility ended with errors
What’s causing this?
The IDMS database file was being allocated with the EXTREQ values in the "Data set name type" field (thus forcing it to be EXTENDED), and 1000 "Secondary tracks." Since IDMS r17.0, DSNTYPE=LARGE is supported for all file types. On the other hand, DSNTYPE=EXTENDED is only allowed for REORG work files. Both LARGE and EXTENDED format files can have more than 65,535 tracks on a single volume.
CA IDMS 18.5 Utility Guide,
Chapter 5: Utility Statements, Sizing work files:
“Consider using extended format data sets for large work files. Although this adds 32 bytes of overhead to each block, extended format data sets can have more extents across more volumes than a basic format data set.”
CA IDMS Release Summary r17 SP1, Chapter 7: Administrative and Operational Enhancements, Support for Large and Extended Format Files;
CA IDMS now supports large format single volume files in z/OS for database
and journal files and both large and extended format for work files
dynamically created by the REORG utility. Both large and extended format
files can have more than 65,535 tracks on a single volume.