The drive that I am using does not have termination resistors on it. It relies on the SCSI bus for termination. ie. an attached terminator in the case of an external drive.

All of the jumpers are set correctly. Here's what happens when I try to format the drive with Drive Setup 1.7.3.1

1. This screenshot shows that Drive Setup recognizes the drive as
    
   
2. This screenshot shows Drive Setup's response when I select the disk
    
   
3. This screenshot shows how Drive Setup responds when I attempt to initialize the disk
    
   
4. This screenshot shows that Drive Setup won't allow me to select {Custom Setup}

The problem, according to my limited understanding of the situation, is that the drive needs to be low level formatted. Unfortunately, the 9.1 GB Seagate drive is too large for Mac OS 8.6 to format. So it wants me to partition the drive into smaller logical units. But Apple's Drive Setup software won't allow me to partition the drive because it is not formatted. It's a real Jim Dandy of a situation.

Only thing I can think of off the top of my head is to do what wthww had suggested. Put the drive in another machine and zero it from that machine. But I don't really have another machine available that has a SCSI bus. So I'm kind of screwed.

Well, I suppose I could install Linux or NetBSD on the old SGI box and try to zero it from there. But that means having to go through all of the trouble of actually installing Linux or NetBSD on the old SGI. And I'm not feeling too enthusiastic about that. Damn! I wish I had a SCSI card for my X86 Linux box. I should invest in one.

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1 The last version of Drive Setup to run in Classic Mac OS.