Schuh, Richard <[EMAIL PROTECTED]> wrote the following on 03/04/08 17:31:44: > And a physical record, otherwise known as a block is the type of record > to which I was referring. The count field, the C of CKD, that has zeros > for both the key and the data lengths is what signals an empty block, > er, physical record. > > I would be very surprised if CMS ever wrote such a record in either file > system. That would destroy the formatting of the remainder of the track > because Write CKD is a formatting write.
In early releases of CMS all disk records were 800 bytes, but later releases changed to 1K, 2K or 4K. All formatting was done when the mini-disk was created.
