Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!van-bc!
From: lphillips@lpami.wimsey.bc.ca (Larry Phillips)
Newsgroups: comp.sys.amiga
Subject: Re: ESDI controllers?
Message-ID: <640@lpami.wimsey.bc.ca>
Date: 18 Jul 89 03:00:57 GMT
Lines: 42
To: van-bc!rnews

In <12227@grebyn.com>, ckp@grebyn.com (Checkpoint Technologies) writes:
>I think the Summary line says it all. SCSI gives superior performance,
>with the right controller and the right drive. ESDI is cheaper, but that
>won't be true for much longer.

Sigh. Here we go again.

 A blue shirt is larger than a red shirt.

 Huh?

 Doesn't make much sense, right?  Well, neither does saying that SCSI gives
superior performance, especially if you are comparing it to ESDI.  Many SCSI
drives (the 'embedded SCSI' type), _ARE_ ESDI drives, while others are ST506
(MFM or RLL), while yet others are proprietary interfaces _Between the Built-In
Controller and the Drive_.  In addition, an ESDI or ST506 drives may be easily
driven by a SCSI host adapter simply by supplying the appropriate controller.

  ESDI is a controller to drive interface, and SCSI is a host adapter to
controller interface, ie.  SCSI is _NOT_ a controller to drive interface.  The
speed you obtain will depend entirely on the maximum speed of the slowest link
in the chain, whether it's the OS, the host adapter, the controller, or the
drive, and this is true no matter where the controller physically resides.


>First comes the logo: C H E C K P O I N T  T E C H N O L O G I E S      / /  
>                                                                    \\ / /    
>Then, the disclaimer:  All expressed opinions are, indeed, factual.  \  / o

Indeed?

>Now for the witty part:    I'm pink, therefore, I'm spam!             \/

-larry

--
Real Amiga hackers write printer drivers using Metascope.
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|   //   Larry Phillips                                                |
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