550: MKD failed. Volume=serial is a tape and is invalid for a PDS.
Explanation
The MKD command was issued to create a new PDS. The SITE VOLUME parameter was in effect, specifying that all new data sets be allocated on volume serial. serial was determined to be a tape, and partitioned data sets cannot be allocated to tape.
System action
The MKD command is rejected. Control is returned to the client connection for further command processing.
User response
Issue the SITE VOLUME command to change or reset the volume serial for new data sets to a direct access volume, then reissue the MKD command.
System programmer response
None.