From: SMTP%"avk@hafnium.cchem.berkeley.edu" 18-JAN-1995 09:29:49.64 To: EVERHART CC: Subj: Re: VAXStations 2000 From: avk@hafnium.cchem.berkeley.edu (Tony Konashenok) X-Newsgroups: comp.os.vms Subject: Re: VAXStations 2000 Date: 18 Jan 1995 07:20:41 GMT Organization: University of California, Berkeley Lines: 31 Message-ID: <3fifg9$neg@agate.berkeley.edu> NNTP-Posting-Host: hafnium.cchem.berkeley.edu To: Info-VAX@Mvb.Saic.Com X-Gateway-Source-Info: USENET In article <01HLYQSBVVHU8X17C8@splava.cc.plattsburgh.edu> "Thomas M. Deso" writes: $! Date sent: 17-JAN-1995 19:44:26 $! All the VAXstation 2000's that I have seen that are setup to use a TK50 $! have an expansion chassis attached to the bottom of them. It is about $! 2 inches in height and has a connector for a second disk drive and a $! conector that "looks like" SCSI for a tape drive. Actually as I remember $! there is no active electronics involved in doing this, just splitting $! and reorganizing of ribbon cables. Bottom line, if it doesn't have the $! expansion chassis, forget the TK50! $! Bzzzt... I had a 2000 with a TK50 and no expansion chassis. All you need to do is to crack the box open, find a 50-pin Berg connector on the motherboard (right next to 60-pin disk connector), and run a flat cable from it through one of the rear panel slots. Let the Centronics connector on the other end of the cable just hang outside. Getting a tape is a different business. You need a TK50-FA, which is a box containing a TK50 and a SCSI-to-TK50 adapter board. These suckers are considerably more expensive than plain TK50's. You can also use TK50Z-GA, a SCSI tape drive for 3100 and their ilk, if you change the SCSI ID to 1 and install the terminators. Theoretically, you can use any SCSI device on this bus if you write your own driver for it. Rumors were Trimarchi was about to release a disk driver when it went bankrupt. Other rumors were that the SCSI interface as the CPU sees it would limit the performance well below theoretical maximum for SCSI. -- Tony Konashenok avk@hafnium.cchem.berkeley.edu 510-843-5632(h) ** Assembler programmers drive stick shifts ** GAT !d H+ s:- !g p? a? w+ C(++) U--/S++++$ N+++ W--(---)/$ V+++ !tv b++++ B-- h----@ f* r+++ y+++