Fujitsu 2444 data rate setting (was Re: Pertec interface)

David Comley wrote: The service manual in Richard's link from Bitsavers has a section which describes a buffer adapter board that is placed between the deck formatter and the host adapter, which contains buffering and rate control It claims to be able to do from 60k / sec up to the 1.2mb / sec. I believe that page 4-52 of the manual, physical page 77 of the document describes the paramter P0 which is the buffer rate select. It refers to "Section 10.7" to see how to set the paramters. Unfortunately, there is only section 1 thru 6, plus appendicies A and B in the manual. I would imagine that to be refering to a user manual. I did not see that yet. However it appears that this may be the paramter you are refering to. I don't recall my tape drive having such a hookup, so that may be why the problems occurred for me. Chuck is probably right about the transfer rate from what he is saying, and that would have been a problem. If the transfer clock was too fast, my host adapter would have not transfered the data, and probably didn't get the transfer performed correctly, so it just hung there. I had suspected the PE burst was the culprit, as it is at the front of any PE or GCR tape (ID burst is what it is also called IIRC). so I thought it may have messed things up. We had had a problem on another deck, a cipher 100x which did strange things between 800bpi (NRZI) and 1600bpi (PE) and the problem turned out to be the burst causing a major malfunction in our somwhat dumb tape controller. Jim manual http://www.bitsavers.org/pdf/fujitsu/B03P-5325-0100A_244X_Jun87.pdf