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

[George's Coco Address]

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