I will attempt to disprove your theory with a counter example.

My centris 650 is connected to a Seagate Barracuda 34371WC running OS 7.6.

The Centris recognizes the drive fine, formats it and it boots after a power
shutdown.

Of course, the 34371WC is connect to the Centris via a SCA to 50 pin
adaptor.

Phil Wong


----- Original Message -----
From: "herb schulsinger" <[EMAIL PROTECTED]>
To: "PCI PowerMacs" <[EMAIL PROTECTED]>
Sent: Friday, July 05, 2002 6:45 PM
Subject: Re: What hard drives do Apple HD Setup supports?

> OK, I'm just guessing here, but I just had a similar situation trying to
connect an
> IBM 36 gig ultra-wide SCSI, 68-pin drive to an Adaptec 29160N host adapter
card with
> a mini-50 external connecter.  Adaptec said that you can go from a 68-pin
connector
> on the card to a 50-pin connector on the drive, but not the other way
around,
> otherwise some signals are lost.  You're stepping down an 80-pin SCA drive
to 50 pins
> -- maybe you're losing the signals that cause the drive to auto-boot.
>
> herb


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