EADSCB: Specify the support level for extended attribute DSCBs

EADSCB=OK

This specification indicates that the calling program supports RTAs that could contain tracks an extended address volume.

For calls that request unallocated space (ACCESS=MAPDATA, MAP=VOLUME, RTA4BYTE=YES and EXTENTS=address), a CVAFDSM request issued to an EAV volume will be failed if the EADSCB=OK indicator is not set.

The failing error code for these cases will be reflected as follows:

CVAF status code (CVSTAT) set to STAT082.
Return code 4.

EADSCB=OK will set the CV4EADOK indicator in the CVPL. All other calls to CVAFDSM are allowed and EADSCB=OK will be ignored.

EADSCB=NOTOK

Indicates a calling program does not support extended attribute DSCBs. EADSCB=NOTOK will set the CV4EADOK indicator in the CVPL to off. This is the default.