Resolving recording technology conflicts for 3592

The 3592 Model J1A and E05 tape drives can both write to MEDIA5-MEDIA8 media types, however conflicts occur, when an EFMT2 formatted cartridge is mounted on a EFMT1-only tape drive and is being relabelled/reused.

The OPEN and EOV routines can resolve these recording technology conflicts if you meet these conditions:

Set OPEN for output to the first file
Specify VOLNSNS=YES in the DEVSUPxx member of PARMLIB
Position the tape cartridge at the load point.

If these conditions are met and if the cartridge has an internal volser recorded in its volume control region, OPEN and EOV routines rewrite the VOL1 label with the volume identifier in the sense data.

Note: To enable this support, make sure that the 3592 Model J1A devices are at the appropriate microcode level, so that an up-level volume can have its volume identifier returned in the sense data.

For additional information about resolving recording technology conflicts, see z/OS DFSMS Using Magnetic Tapes and z/OS DFSMS Installation Exits.