G'day Steve -
I will try to contact you off list (again) to give you the programs and
info you are looking for ...
Bruce
Bruce Ray
Wild Hare Computer Systems, Inc.
bkr at 
WildHareComputers.com
www.NovasAreForever.org
On 3/6/2013 7:09 AM, Steve Merrony wrote:
  What is the current best practice for creating an
image of a SCSI tape
 in such a way that it can later be used to reliably make a replica of
 that tape?
 I have a fully functioning SCSI tape drive (via Linux at the moment) and
 want to image various sorts of Data General (and other) tapes safely and
 also duplicate a couple of them.  They are in various odd formats.  I
 can use the non-rewinding device (/dev/nrst0 etc) to get individual
 files off the tapes but that is tedious and writing a tape like that
 seems like a nightmare.
 I found tcopy and built it - but it expects two drives and does not deal
 with the drive-and-file case.
 Steve
 DG Info and Restoration Blog - 
http://stephen.homedns.org/dg/