russell@kings.co.uk (Russell Brown) (02/07/90)
How does one terminate the SCSI bus? can the net.helpful.people assist me with this problem. I have a portable (lunchbox style) system fitted with an Adaptec 1542A SCSI controller. The connections to the Hard Disk are from the internal IDC connector on the 1542, but the tape drive lives outside the box and uses the 50 way D type external connector on the 1542. Therefore I have removed the bus termination pullups from the 1542 just like TFM says. When I go walkabout with the machine I want to leave the tape on the desk but this will leave the SCSI external bus unterminated. Grovelling around inside the box and refitting the 1542 pullups is NOT something that I really want to do! How therefore, should I terminate the SCSI bus? Can someone tell me which pins on the 50 way connector I should connect via some value of resistor? Many thanks in advance. Post or EMAIL - I'll summarise if requested. -- ------------------------------------------------------------------------- | Russell Brown | Voice: +44 832 272224 | | Lady Lodge Systems | EMAIL: russell@kings.co.uk | | Chapel Row Cottage, Lutton | UUCP: mcvax!ukc!{stc,logitek}!\ | | Peterborough, PE8 5NE, England. | kings!russell | -------------------------------------------------------------------------
larry@nstar.UUCP (Larry Snyder) (02/07/90)
In article <21@kings.co.uk>, russell@kings.co.uk (Russell Brown) writes: > > I have a portable (lunchbox style) system fitted with an Adaptec 1542A > SCSI controller. The connections to the Hard Disk are from the internal > IDC connector on the 1542, but the tape drive lives outside the box and > uses the 50 way D type external connector on the 1542. Therefore I have > removed the bus termination pullups from the 1542 just like TFM says. What tape drive are you using (Make/Model)? -- Larry Snyder, Northern Star Communications, Notre Dame, IN USA uucp: larry@nstar -or- ...!iuvax!ndmath!nstar!larry 4 inbound dialup high speed line public access system
dag@fciva.FRANKLIN.COM (Daniel A. Graifer) (02/23/90)
Our Excabyte tape drive (purchased oem from Prime Computer) came with a terminating resistor set built into a 50-pin parallel type male plug. It says "AMP 868875-1 Termination Connector". One of these should solve your problem. Just unplug the tape drive and cable, and plug in the terminator. Good luck Dan ----- Daniel A. Graifer Franklin Mortgage Capital Corp. Vice President, Systems and Analysis 7900 Westpark Drive, Suite A-130 (202)448-3300 McLean, VA 22120 uunet!fciva!dag -- Daniel A. Graifer Franklin Mortgage Capital Corporation uunet!dag@fmccva.franklin.com 7900 Westpark Drive, Suite A130 (703)448-3300 McLean, VA 22102