I'll fiddle with the termination a bit. Thanks for the tip!

On Sun, 21 Jan 2001, Tod McQuillin wrote:

> On Sun, 21 Jan 2001, Jeff Wyman wrote:
> 
> > I have one of these drives installed in my IIcx at the moment, and it
> > doesn't seem to want to detect it.
> 
> I have found that some seagate drives are very finicky in old Macs.  I
> had a ST31200N installed internally in a IIcx and it was extremely
> sensitive to termination.
> 
> First I set the termination jumpers on the drive in various permutations
> (terminator power from/to bus, drive supplies terminator power, etc)
> always with termination enabled.  No matter how I set it it would not
> work.
> 
> Next I connected an external drive with termination to the external scsi
> port (leaving the ST31200N installed inside).  This time the system
> recognised both disks!  Even with the external disk turned off, as long as
> it was terminated the system saw the internal ST31200N.
> 
> Eventually I gave up on using the seagate's built-in termination and
> switched to disabling the drive's termination and using a terminated
> internal scsi cable (the default internal cable that comes with the Mac is
> *not* terminated).
> 
> Now the system works just fine even with nothing connected to the external
> bus at all.
> 
> My advice to you:  disable the drive's termination and get yourself a
> pre-terminated internal cable.
> -- 
> Tod McQuillin
> 
> 
>