[SunRescue] Something special about a SUN 2x CD?

[Maarten Deen]

> 
> I got similar results when I installed a faster Toshiba SCSI CD in the old
> 411 box to replace the 2x drive.  Mine turned out to be SCSI ID problems.
> What I found was that the jumper switch assembly would not work for the new
> drive and indeed caused the drive to appear on all IDs.  When I used
> physical jumper blocks the problem was fixed.

Yes, I remember having the same kind of problems on a 3rd-party SCSI
box with SCSI jumpers. What I found out is that the Sun ID-block has one
side of the jumpers electrically connected (maybe even tied to ground)
and some drives cannot cope with that. You may also get strange results
if you turn the sun-block 180 degrees (as another poster commented)

Maarten Deen

> -----Original Message-----
> From: rescue-admin at sunhelp.org [mailto:rescue-admin at sunhelp.org]On
> Behalf Of Ken Hansen
> Sent: Sunday, October 22, 2000 11:32 PM
> To: rescue at sunhelp.org
> Subject: Re: [SunRescue] Something special about a SUN 2x CD?
> 
> 
> I have gotten similar (peculiar) activity when I put a CD-ROM drive on an
> Axil 245 system - with the CD-ROM attached, the whole SCSI chain seemed bad,
> but when removed, everything was fine...
> 
> I stopped working on that box for a while (the old OS install was tolerable
> for now), but your post has me curious... I had a good drive, cable &
> terminator, as I was able to move the same setup over to an LX and do an
> install w/o problem.
> 
> probe-scsi didn't shoe the drive on all IDs, but it did repeat the drive
> information from the one HD on the chain for the CD-ROM drive...
> 
> Something was goofy...
> 
> Ken
> ----- Original Message -----
> From: "scohen - Stephen Cohen" <scohen at acxiom.com>
> To: <rescue at sunhelp.org>
> Sent: Sunday, October 22, 2000 11:47 PM
> Subject: [SunRescue] Something special about a SUN 2x CD?
> 
> 
> > The Sun 2x CD drives my system crazy.  When set up as ID6, it will appear
> on
> > any unused ID as shown with probe-scsi.
> >
> > Removing the CD enables probe-scsi to see everything correctly.
> >
> > I can 'boot cdrom', but when the RedHad loader wants to actually mount the
> > CD, the process fails.
> >
> > What is so special with this device?
> >
> > Regards,
> > Steve
> > _______________________________________________
> > Rescue maillist  -  Rescue at sunhelp.org
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