[Coco] [Color Computer] [coco] SCSI trouble

[Robert Gault]

George's Coco Address wrote:
> I use a Ken-Ton SCSI interface on one of my coco3 machines under OS9 L2. In 
> a recent attempt to backup the hard drive (ST138N) to another, external 
> ST138N, I discovered that I could not access the external drive and the 
> internal drive is being accessed as both /h0 and /h1.
>  This system used to work, but it was a long time ago since I did a backup.
> 
>  Any suggestions as to what may cause this problem?
> 
> George 
> 
> 

More details on your system would be helpful. Are you saying that you 
have an "internal" hard drive (whatever that means) and two "external" 
hard drives? Or are you saying you have an original hard drive and added 
a second, ignoring external/internal? Post the specifics for the /h0 and 
/h1 descriptors.

The Ken-Ton will support scsi bus selection but that may not be part of 
your driver. It will certainly support multiple hard drives.

If you were able to talk to two hard drives in the past, then something 
changed. The change is either hardware or software and telling which 
should be trivial. If you swap the drives, can you talk to the second 
drive? If yes, then the problem is software.

Did you change hdisk.dr, /h0, or /h1 since being able to talk to two 
hard drives? Did you change from stock OS-9 to NitrOS-9, or from one 
version of NitrOS-9 to another?