The problem is not the dasd volume, it's the tape.? You probably reformatted the tape into AWS format, but DFDSS does not understand the record formats you are trying to install to the disk.
To copy a volume from a mainframe to Hercules, you need to upload the tape dataset to your PC in binary format and then upload that dataset to an empty DASD volume on your hercules based z/OS and restore it from there.
Alternatively, I think there is a mod somewhere that you can use on the original mainframe that causes DFDSS to create the AWS format dataset that you can use with hercules.? DFDSS expects each block to be a track image, but I think when you made the AWS tape, you changed the blocks to be quite a bit smaller, but the DFDSS you are using under hercules doesn't "know" that it needs to combine blocks to get a real track image.
There are several methods you can use to copy your data from a mainframe to hercules, but the one you are using isn't one that I have heard of previously.?
Anyway, there are several tried and true methods to transfer the data.
Brian
