Writing SCSI 9-Track Mag Tapes from Windows/DOS

simon simski at dds.nl
Mon Oct 5 09:09:11 CDT 2015

well, we at hack42 are discussing a pertec to usb converter based on a 
microcontroller. pertec seems straightforward, now how to present the 
drive to the os...


On 03-10-15 10:20, Mike Ross wrote:
> Question: will this kind of hookup work with a USB-SCSI converter? If
> so, are there any specific brands and models known to work? I'm
> interested in both SE & differential, 50 pin & 68 pin.
> Or does it need a traditional Adaptec or similar card?
> Preferably under Linux; Windows possible but deprecated.
> Mike
> On Sat, Oct 3, 2015 at 7:52 PM, John Wilson <wilson at dbit.com> wrote:
>> On Fri, Oct 02, 2015 at 11:28:49PM -0700, Marc Verdiell wrote:
>>> Thanks for your STP2T02.exe  SCSI tape to SIMH program. Ran like a champ
>>> under Win98 DOS, first time. It's the only utility that did work out of the
>>> box to read a tape from my SCSI-1 HP 88780 9-track into a SIMH file,  out of
>>> the 5 or so I tried.  Before I jump to Linux, which seems to be the more
>>> straightforward option, does anyone have the reverse tool to write a SIMH
>>> image file on a 9 Track tape under Windows/DOS? None of the utilities I
>>> found using Windows Tape APIs could deal with my tape SCSI-1 early
>>> interface, they all expect some basic (SCSI-2?) functions that are not
>>> implemented.
>> My "ST.EXE" program (available from http://www.dbit.com/pub/ibmpc/util/
>> including source) runs on real DOS (not Windows) and can write from an
>> E11-format .TAP file (which SIMH uses a garbled version of, but they're
>> interchangeable for *even* record lengths which are 99% of the universe)
>> to a real tape.  It works on my HP 88780, and my Qualstar 1260S and even
>> a DEC TZ30 or TK50Z-GA (which aren't quite full SCSI-1).  Not picky at all.
>> "st wput foo.tap" should write your image out.  You need a DOS ASPI driver
>> for your SCSI card, and you'll need to use something like "-f scsi5:" on
>> the command line (or set the TAPE environment variable) so ST will know
>> which SCSI ID (etc.) to use.
>> John Wilson
>> D Bit

Met vriendelijke Groet,

Simon Claessen

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