mfi@serc.cis.ufl.edu (Mark Interrante) (02/15/91)
Hi, I have a cube with an OD (when it was a demo at BL it had a 330mb in it). I just bought a Fujitsu 415mb from Fast access and installed it. The drive sits on top of the OD with the power cable on the right. When I plug the 25 pin flat cable (that comes out of the cpu to the OD then to the HD) in and boot the cube says loading from OD then immediatley tries to load off the network (which doent exist). If I unplug the Fujitsu everything works. I am pluging the cable into the right most part of the 50 pins. Note that flipping the cable makes no difference. Has anyone had such a problem on their disk? Thanks, ----------------------------------------------------------------------------- Mark Interrante Software Engineering Research Center mfi@beach.cis.ufl.edu CIS Department, University of Florida 32611 ----------------------------------------------------------------------------- Quote from a west Texas farmer "status quo is Latin for the mess we're in."
ice@wang.com (Fredrik Nyman) (02/15/91)
mfi@serc.cis.ufl.edu (Mark Interrante) writes: > The drive sits on top of the OD with the power cable on the right. > When I plug the 25 pin flat cable (that comes out of the cpu > to the OD then to the HD) in and boot the cube says loading from OD > then immediatley tries to load off the network (which doent exist). > If I unplug the Fujitsu everything works. I am pluging the cable > into the right most part of the 50 pins. Note that flipping the > cable makes no difference. Has anyone had such a problem on their disk? It sounds like your OD has a SCSI bus termination. Remove it and make sure your Fujitsu has SCSI termination. -- Disclaimer: Wang doesn't care about my opinions, so why should you? Internet: <ice@jasmine.wang.COM> <ice@wang.COM> <ice@emil.csd.uu.se> BITNET: <ice@DRYCAS> <ice@SEARN> <ice@SEQZ51> (in order of preference) USnail: Wang Labs, Inc., M/S 019-490, One Industrial Ave., Lowell, MA 01851
cdl@chiton.ucsd.edu (Carl Lowenstein) (02/16/91)
In article <b0w7j6.mlm@wang.com> ice@wang.com (Fredrik Nyman) writes: |mfi@serc.cis.ufl.edu (Mark Interrante) writes: |> The drive sits on top of the OD with the power cable on the right. |> When I plug the 25 pin flat cable (that comes out of the cpu |> to the OD then to the HD) in and boot the cube says loading from OD |> then immediatley tries to load off the network (which doent exist). |It sounds like your OD has a SCSI bus termination. Remove it and make |sure your Fujitsu has SCSI termination. The OD is not a SCSI device, and has its own bus and cables. Somewhere there has to be another cable for the SCSI. Also, a SCSI cable is 50 pins wide, not 25. So look for the 50-pin connector on the mother board, and try to follow it along toward the drive bay. Maybe you will have to get another cable, if there isn't one already present. It's a straight 50-pin to 50-pin flat cable, pin 1 to pin 1 etc. -- carl lowenstein marine physical lab u.c. san diego {decvax|ucbvax} !ucsd!mpl!cdl cdl@mpl.ucsd.edu clowenstein@ucsd.edu
louie@sayshell.umd.edu (Louis A. Mamakos) (02/16/91)
>> The drive sits on top of the OD with the power cable on the right. >> When I plug the 25 pin flat cable (that comes out of the cpu >> to the OD then to the HD) in and boot the cube says loading from OD >> then immediatley tries to load off the network (which doent exist). > >> If I unplug the Fujitsu everything works. I am pluging the cable >> into the right most part of the 50 pins. Note that flipping the >> cable makes no difference. Has anyone had such a problem on their disk? > >It sounds like your OD has a SCSI bus termination. Remove it and make >sure your Fujitsu has SCSI termination. Gack! The major problem here is that the OD is not a SCSI device. That's why plugging the OD cable (with its 25 pins) into the SCSI drive doesn't do anything useful. Because of this, the OD won't have "a SCSI termination." There is a 50 pin connected on the CPU board which is the SCSI port. You need a 50 conductor cable with the appropriate connectors to connect the SCSI port to the SCSI drive. I'm surprised your machine still works. Your clue should have been plugging a cable into a connected and having pins "left over." Flipping cables is also usually a bad idea, since the other set of pins (for a SCSI cable, at least) are at ground potential. This sort of this isn't helpful for the components. Then there's the matter of the termination power that might be present on the disk drive. Louis Mamakos "No user servicable parts inside."
mdixon@parc.xerox.com (Mike Dixon) (02/17/91)
The drive sits on top of the OD with the power cable on the right.
When I plug the 25 pin flat cable (that comes out of the cpu
to the OD then to the HD) in and boot the cube says loading from OD
then immediatley tries to load off the network (which doent exist).
whoa, you're in trouble boy. the OD plugs into a completely different
connector on the processor board than the scsi devices; if you've got
one cable connected to both the OD and a scsi disk you're seriously
confused. hope you haven't fried anything...
--
.mike.