There is Apple specific information in the disk ROM that HD SC Setup 
looks for.  Probably stored in Mode Page 0 which is reserved for vendor 
unique information.

You can read and dump the Mode Pages on SCSI devices and even modify 
some of the parameters with the right utility. FreeBSD and OpenBSD have 
a utility called "scsi" that does this.  I've got a current version 
running on NetBSD. If anyone wants the sources I have them at:

    ftp://murphy.dyndns.org/pub/scsi.tgz

-bob

On Monday, May 6, 2002, at 01:53 PM, Don Bruder wrote:

> You *SHOULD* be able to do that, yes. Whether you *WILL* be able to or
> not... Well, that's another question. Some versions of HD SC Setup seem
> to look for something (I've never been able to find out exactly what)
> that says "Yep, this is an Apple drive, so I can work with it". I've
> seen cases where Apple drives were reformatted on a SCSI-equipped Wintel
> box, (for the sole purpose of wiping them clean, overwriting anything
> that *MIGHT* be left, and starting from ground zero - it was a paranoid
> company) and then put back in the Mac, and HD SC Setup refused to work
> with them. (or even acknowledge the fact that they existed) On the other
> hand, I've seen other cases where they were reformatted in a Wintel box,
> used for months there, then moved back to a Mac, and HD SC Setup was
> perfectly content to deal with them. Why? <shrug> You tell me. I've
> never been able to find out.