[ale] Adaptec 29160 termination problems

[Gary S. Mackay]

Jeff
	The docs say the 68pin internal and external connectors are 'primary', while
the 50 pin connector and another 68pin connector are 'secondary'. The docs
recommend you to put the 'fast' device which in my case is the hard drive, on
the 'primary' port and the 'slow' device which is the tape drive, on the
'secondary' port. So, I only have one device on each port. The 68pin '160'
cable has a terminator on it so I left the termination jumper off of the hard
drive. The 50pin cable does not have any termination on it, and the tape drive
docs say to NEVER take the 'term power' jumper off. (I made sure no one was
looking when I tried taking it off just to see what would happen :)). 

Thanks for the response,
- Gary


Jeff Hubbs wrote:
> 
> Gary -
> 
> I know that a 50-pin device cannot be used to terminate a 68-pin bus.  I
> don't have any exper with the 29160 nor using cards that have both 68-
> and 50-pin connectors, but what I think might be happening is that the
> 50-pin connector and the 68-pin connector are on the same bus.  Check
> your docs carefully as to whether or not you can only use one of those
> connectors at a time.  I get the feeling that if you connect a
> three-position 68-pin cable to the corresponding connector on the card,
> put the HD with termination enabled on the other end of the cable, and
> then put the tape drive with termination disabled on the middle
> connector via a 68/50 adaptor, you'll be just fine.
> 
> - Jeff
> 
> "Gary S. Mackay" wrote:
> >
> > I just built a new server using the Adaptec 29160 SCSI card with an IBM
> > UltraStor 18gig drive. The drive is connected to the 68pin primary connector.
> > All was fine until I connected an HP DAT24i tape drive to the 50pin secondary
> > connector. Now I get a "Attention! Insufficient termination detected on SE
> > devices" error message every time I boot. Oddly enough, everything works just
> > fine. The Tapeware software preforms backups,verifies, and restores just fine.
> > The system boots and runs fine also. No problems other than the message. I
> > presume I should be worried??
> >
> > Things I've tried so far:
> > 1. YES, I DID CHECK each of the jumper settings for termination.
> >    All is well. HD is on 0, tape is on 3.
> > 2. Changed the scsi bios (ctrl-a) settings for termination to every option I
> > could find.
> >    No difference.
> > 3. For kicks and grins, I changed jumper settings on tape drive.
> >    No difference.
> > 4. Punt?
> >
> > - Gary
> >
> > --
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> > Edison Information Technologies            www.EdisonInfo.com
> > P.O. Box 554                               Gary at EdisonInfo.com
> > Milan, OH  44846-0554                      419.499.7040
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Edison Information Technologies            www.EdisonInfo.com
P.O. Box 554                               Gary at EdisonInfo.com
Milan, OH  44846-0554                      419.499.7040
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