[rescue] SCSI Zip on SGI O2

Curtis H. Wilbar Jr. rescue at hawkmountain.net
Thu Oct 16 23:58:45 CDT 2003

I personally would not trust the termination in a SCSI ZIP drive....

Your going to need to terminate the high bits when you go from wide
scsi to narrow scsi ... so make sure when you make that transition
your terminating the high order bits.... then you want to terminate
(actively) the low order 8 bits after the zip drive.

Make sure you use active termination in both places.

Failure to terminate the bus properly will lead to all sorts of
potential havoc/data loss.

-- Curt

On Thu, 2003-10-16 at 17:19, Kurt Huhn wrote:
> On Thu, 16 Oct 2003 08:42:02 -1000
> Lom Defer wrote:
> > I recently bought a legacy iomega 250 scsi zip drive to hook to my o2.
> > There is a active terminator on the current scsi devices (external
> > disk and floppy disk) connected to the o2.  i plan to add the zip at
> > the end of the chain.  do i still need an active terminator?  the zip
> > seems to have an internal termination (small switch on the back of the
> > drive: termination on / off). the scsi connection on the zip is a
> > 25-pin.  o2 requires 68-pin.  i assume a 25 to 68 scsi adapter is all
> > i need. correct?  sorry for these basic questions on this forum.
> > 
> You can add that Zip with no problems that I'm aware of.  Flip the
> terminator to on, add it at the end of the chain, and you're all set. 
> 68-pin to 25-pin cables are readily available at any decent retailer.

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