Clem, MultiNet included rmt support. I do not know which versions included it or whether MultiNet has a Hobbyist License.
Larry Baker US Geological Survey 650-329-5608 ba...@usgs.gov > On 25 Jan 2018, at 7:57:30 AM, simh-requ...@trailing-edge.com wrote: > > Message: 1 > Date: Thu, 25 Jan 2018 09:57:54 -0500 > From: Clem Cole <cl...@ccc.com <mailto:cl...@ccc.com>> > To: Zane Healy <heal...@avanthar.com <mailto:heal...@avanthar.com>> > Cc: Mark Pizzolato <m...@infocomm.com <mailto:m...@infocomm.com>>, simh > <simh@trailing-edge.com <mailto:simh@trailing-edge.com>> > Subject: Re: [Simh] VAX Tape Emulation? > Message-ID: > <CAC20D2Ouuwmo_1bO_uUxNPofi7pV5iRRP=qvWujoN4B-sye=v...@mail.gmail.com > <mailto:CAC20D2Ouuwmo_1bO_uUxNPofi7pV5iRRP=qvWujoN4B-sye=v...@mail.gmail.com>> > Content-Type: text/plain; charset="utf-8" > > On Wed, Jan 24, 2018 at 5:25 PM, Zane Healy <heal...@avanthar.com > <mailto:heal...@avanthar.com>> wrote: > >> >> I’d like to backup to a simulated tape drive on the one emulated VAX. >> The largest drive on my Alpha is 50GB. I’d prefer not to have to span >> tapes. :-) > > Another thought... what are you running the emulator on? Is it a > UNIX/Linux flavor of some type? I ask because there might be another > solution that could work a little better in practice, although you'll need > to pull together some pieces. The problem is the bits in my brain WRT > to VMS are 20+ years old and I've forgotten the details so you'll have to > do some homework. > > At one point, I remember that some VMS folks in ZK3 (CJ Coppersmith seems > to stick in my head by I do not remember) were messing we putting a the UCB > sockets library into VMS and were somebody ported the Berkeley rcmd(3) > suite on VMS from Tru64. I'm not sure if how much of that library or > which commands ever saw the light of day in a production version of VMS. > But the idea (then) was that a VMS system could use remote services (such > as a tape) via a socket. The UNIX command is called rmt(8) (and of course > mt(8) and IIRC rmt(8) was originally based on the rcmd(3) calls from > rsh/rcp et al. > > So assuming VMS supports same, using mt(8)/rmt(8) is trival on a UNIX side. > But more importantly for you is that on the UNIX side the remote > 'device' can be a UNIX file as easily as a physical tape if the 'source' > side knows about using a socket as the output 'device.'. I've used this > trick to back up some older systems to modern devices these days (my > Masscomp box for instance). The "tape files" are stored on my NAS which > has redundant physical disks etc... In fact, I've even recompiled mt/rmt > for my Mac at one point and I have it working on *BSD with modern tapes > (just needed to grab the mtio.h file from BSD). > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://mailman.trailing-edge.com/pipermail/simh/attachments/20180125/1de6d487/attachment-0001.html > > <http://mailman.trailing-edge.com/pipermail/simh/attachments/20180125/1de6d487/attachment-0001.html>>
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