Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!hplabs!hp-sdd!ncr-sd!sagpd1!monty
From: monty@sagpd1.UUCP (Monty Saine)
Newsgroups: comp.sys.amiga
Subject: Re: Apple SCSI not compatible with standard SCSI?
Keywords: SCSI hard disk amiga
Message-ID: <561@sagpd1.UUCP>
Date: 19 Dec 89 16:52:27 GMT
References: <5466@nigel.udel.EDU> <1371@clinet.FI>
Reply-To: monty@sagpd1.UUCP (Monty Saine)
Organization: Scientific Atlanta, Government Products Div, San Diego, CA
Lines: 26

In article <1371@clinet.FI> toweri@clinet.UUCP (Jukka Lindgren) writes:
>Is anyone out there able to tell, how "standard" the "standard"
>SCSI-drives are?
    
    In MOST instances the hardware is "standard" (apple has a different
reset handling method) your problem lies in which SCSI commands are
implemented and how they are implemented. I am presently working on a
SCSI project and have two devices that handle reporting of bad blocks entirely
different. One uses the extended request sense command and the other
uses a specific command to return the information. The point here is
that the SCSI spec leaves a lot of "user definable" holes that are filled
differently by different manufacturers. 
    I guess the real answer to your question is the bus is standard but
the information carried over it is not.

    Hope I helped
    Monty Saine

>
>In my work, I am seeing a lot of >300Mb SCSI-drives, and sometimes I
>have wondered, if it would be possible to connect them to my Amiga.  
>I have GVP 42Mb drive with GVP controller.  It has an external connector
>(25 pins) and it draws its power from Amigas own power supply.  Is the
>external connctor ONLY for Amiga-SCSI-drives, or is it universal?
>(More or less, at least...)
>