EADSCB=value: Specify the support level for extended attribute DSCBs.

EADSCB=OK

This specification indicates that the calling program supports extended attribute DSCBs. An extended address volume may have these DSCBs allocated to it. The returned DSCBs (format-3, format-8) may contain extent descriptors described by 28-bit cylinder addresses or DSCBs (format-9) that contain additional attribute information.

For calls that initiate physical sequential access (DSN=0 or omitted), a CVAFSEQ request issued to an EAV volume will be failed if this new, EADSCB=OK, indicator is not set.

For calls that initiate index order (DSN=address) where the BUFLIST=address keyword is specified, a CVAFSEQ request issued to an EAV volume will be failed if the EADSCB=OK indicator is not set and the DSCB associated with this address is a format-8 DSCB.

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 CVAFSEQ are allowed and EADSCB=OK will be ignored. That is CVAFSEQ calls with DSNONLY=YES and ARG=address specified.

EADSCB=NOTOK

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