jte@psuvax1.UUCP (Jon Eckhardt) (10/16/86)
I have about 5 AT&T 3B2/300s linked together over 3BNET (ack!). 2 out of the V have direct 9600b UUCP lines to our Vaxen. I want to know if their is any way that I can dump my 3B2 to a tape drive hanging off of our vax. I don't care what density. I just sick of the floppy drives, the way they they munch on disks, make nice sounds and stuff. Thanks in advance for any info/help/sources. --Jon --------------------------------------------------------------------------- Jon Eckhardt | jte@psuvax1.BITNET 736 W. Hamilton Ave. | jte@psuecl.BITNET (VMS account) State College, PA 16801 | jte@psuvaxg.BITNET (Last resort for bitnet) --------------------------------------------------------------------------- UUCP = <allegra,ihnp4,atcgva,burdvax,purdue>!psuvax1!jte --------------------------------------------------------------------------- 186,000 miles per second. Not just a good idea it's the law. A mind is wonderfull but a waste. Phone: 814-237-1901 ---------------------------------------------------------------------------
jrw@hropus.UUCP (Jim Webb) (10/18/86)
:-) > I have about 5 AT&T 3B2/300s linked together over 3BNET (ack!). 2 out of > the V have direct 9600b UUCP lines to our Vaxen. I want to know if > their is any way that I can dump my 3B2 to a tape drive hanging off of > our vax. I don't care what density. I just sick of the floppy drives, > the way they they munch on disks, make nice sounds and stuff. Thanks > in advance for any info/help/sources. Hmm, at 9600 baud, it would an awful long time to backup 30 Meg :-). I am going to make the assumption that your vax is running System V... AT&T did at one point offer COMMKIT ethernet for the vax that was compatible with 3Bnet. I have it running on some vaxen here networked to some 3b20's and it works just as well as 3bnet does, meaning it gets the job done. Now, I haven't tried this, but I suppose it is possible to say something to the effect of: nisend -d vax -a 666 -f "vaxtape" "3b2disk" Of course, now you have to write a utility to be able to extract a file from this tape on the vax if you don't want to redo the entire slice of the 3b2. I wouldn't think it to be too difficult, tho. What would really be nice is to have nisend be able to interactively read stdin and write across the net so you could do something like this: find . -print | cpio -ocm | nisend -d vax -f "vaxtape" If you could do this, no disk space problems would present themselves. Now, on another front, you could buy expansion modules and use cartridge tapes. I don't know if you could just buy one and just power up and down the 5 3b2's and plug it in the back, or if it would be worth the trouble. -- Jim Webb "Out of phase--get help" ...!ihnp4!hropus!jrw "Use the Force, Read the Source"
jrw@hropus.UUCP (Jim Webb) (10/19/86)
Before people start jumping down my throat, let me explain more on this: > What would really be nice is to have nisend be able to interactively > read stdin and write across the net so you could do something like this: > > find . -print | cpio -ocm | nisend -d vax -f "vaxtape" > > If you could do this, no disk space problems would present themselves. Obviously, this does not work too well now, as you would need an awful lot of disk space on the 3b2, twice as much as the amount you are backing up. By interactive, I meant that the nisend would read its stdin and transmit it as it is reading it. If it could do this, it would not have to buffer it in a file somewhere. The "host" command available on vaxen using the DEC HSC disk controller allows this. -- Jim Webb "Out of phase--get help" ...!ihnp4!hropus!jrw "Use the Force, Read the Source"
jte@psuvax1.UUCP (Jon Eckhardt) (10/21/86)
In article <739@hropus.UUCP> jrw@hropus.UUCP (Jim Webb) writes: > > :-) >> I have about 5 AT&T 3B2/300s linked together over 3BNET (ack!). 2 out of >> the V have direct 9600b UUCP lines to our Vaxen. I want to know if >> their is any way that I can dump my 3B2 to a tape drive hanging off of >> our vax. I don't care what density. I just sick of the floppy drives, >> the way they they munch on disks, make nice sounds and stuff. Thanks >> in advance for any info/help/sources. > > >I am going to make the assumption that your vax is running System V... Sorry, I forgot to add this. My vaxen are running 4.2/4.3 --Jon --------------------------------------------------------------------------- Jon Eckhardt | jte@psuvax1.BITNET 736 W. Hamilton Ave. | jte@psuecl.BITNET (VMS account) State College, PA 16801 | jte@psuvaxg.BITNET (Last resort for bitnet) --------------------------------------------------------------------------- UUCP = <allegra,ihnp4,atcgva,burdvax,purdue>!psuvax1!jte --------------------------------------------------------------------------- 186,000 miles per second. Not just a good idea it's the law. A mind is wonderfull but a waste. Phone: 814-237-1901 ---------------------------------------------------------------------------
brad@bradley.UUCP (10/22/86)
Check out 'kermit(1)' you could log into using a script and start
up a kermit on the 3b2 and on the vax which dumps to the tape
drive. The Ckermit manual explains it. I have it if you need it.
Bradley Smith UUCP: {cepu,ihnp4,noao,uiucdcs}!bradley!brad
Text Processing ARPA: cepu!bradley!brad@UCLA-LOCUS
Bradley University PH: (309) 677-2337
Peoria, IL 61625pld@cantor.UUCP (Peter Dordal) (10/22/86)
> > I have about 5 AT&T 3B2/300s linked together over 3BNET (ack!). > > I want to know if their is any way that I can dump my 3B2 to a > > tape drive hanging off of our vax. > Hmm, at 9600 baud, it would an awful long time to backup 30 Meg :-). > . . . > What would really be nice is to have nisend be able to interactively > read stdin and write across the net so you could do something like this: > > find . -print | cpio -ocm | nisend -d vax -f "vaxtape" > > If you could do this, no disk space problems would present themselves. I have written a pair of programs "sender" and "receiver" to implement exactly this. The stdin of sender becomes the stdout of receiver; the two programs run on different machines and communicate via "raw" ethernet. Thus, I can back up machine borel using the tape drive on abel via borel: find whatever -print | cpio -oac | sender abel: receiver >/dev/rTheTape On a lightly loaded net I can transfer about 2 meg/minute, which is faster than our puny cartridge tape drive can write even at the best of times. At 9600 baud, the transfer rate would be ~60K/min. The bottleneck for me, as it turns out, is the raw device interface to the tape drive, which can only crank out 1 meg/9 minutes, or ~3 hours per 20+ meg tape cartridge. The AT&T tape backup utilities bypass this raw device driver and turn on "streaming" mode to write at 1 meg/1 minute; source for these utilities, of course, was *not* included in our source distribution. Release 3.0 of UNIX is supposed to allow one to use devices on remote machines, so I could do the following on borel (referring to the AT&T utility ctccpio): ctccpio -oa -T abel!/dev/rSA/ctape1 (I think I have the syntax right.) We have ordered 3.0, but it has not yet arrived. My implementation of sender and receiver is a little sloppy, especially since I started with some major misconceptions of just how ethernet worked. It also prints a bunch of dumb diagnostic and timeout messages as it proceeds. Thus, I'm reluctant to post it until I can clean it up. However, I will send it to anyone who wants it; it seems to work and, since it deals in raw ethernet packets, it should be useable between any pair of ethernet systems (not just 3BNET). The basic idea is that sender sends a 1K data packet, and receiver sends an acknowledgement, and so on until done. At that point, things hang. peter dordal loyola univ. of chicago dept of mathematics 6525 N. Sheridan Road Chicago IL 60626-5387 Send requests to the address above or to ...!ihnp4!gargoyle!cantor!pld
wcs@ho95e.UUCP (#Bill.Stewart) (10/28/86)
In article <2311@psuvax1.UUCP> jte@psuvax1.UUCP (Jon Eckhardt) writes: >In article <739@hropus.UUCP> jrw@hropus.UUCP (Jim Webb) writes: >>> I have about 5 AT&T 3B2/300s linked together over 3BNET (ack!). 2 out of >>> the V have direct 9600b UUCP lines to our Vaxen. I want to know if >>> their is any way that I can dump my 3B2 to a tape drive hanging off of >>> our vax. I don't care what density. I just sick of the floppy drives, >Sorry, I forgot to add this. My vaxen are running 4.2/4.3 I assume you mostly want the capability to do backups? If so, 9600 baud uucp is usually good enough; set up a cron script to uucp the files to yourvax!~uucp/backup/`uname`/$ORIGPATH, overnight, and make tapes in the daytime. You can also get TCP/IP for your 3B2s (I don't know the details - call 1-800-828-UNIX - but it's a Wollongong port, probably called WIN/3B), and tie that in to the Ethernet on your VAXen, if you have one. -- # Bill Stewart, AT&T Bell Labs 2G-202, Holmdel NJ 1-201-949-0705 ihnp4!ho95c!wcs