Xref: utzoo comp.sys.amiga:24424 comp.sys.amiga.tech:2230
Path: utzoo!utgpu!attcan!uunet!cbmvax!joe
From: joe@cbmvax.UUCP (Joe O'Hara)
Newsgroups: comp.sys.amiga,comp.sys.amiga.tech
Subject: Re: Hard Disk Performance tests, comments invited
Message-ID: <5072@cbmvax.UUCP>
Date: 23 Oct 88 03:28:21 GMT
References: <10150@cup.portal.com> <5030@cbmvax.UUCP> <193@kesmai.COM>
Reply-To: joe@cbmvax.UUCP (Joe O'Hara)
Distribution: na
Organization: Commodore Technology, West Chester, PA
Lines: 31

In article <193@kesmai.COM> dca@kesmai.COM (David C. Albrecht) writes:
>In article <5030@cbmvax.UUCP>, jesup@cbmvax.UUCP (Randell Jesup) writes:
> > 
> > >Miniscribe 3053 5.25" 40meg, CPU=68030, 32bit memory, FFS , Commodore 2090
> > >Commodore A2090 is a DMA controller (ST-506)
> > >r/w speed:		buf 32768 bytes, rd 84562 byte/sec, wr 34492 byte/sec
> > 
> > Please note that the Minscribe is, I believe, a 40 ms or maybe slower drive,
> > unlike the Quantum 40S's you were using above.  Also note that the speed of
> > a 2090 may well be faster using SCSI than St506.
> > 
>Not to disagree with the other points in your article, I wanted to correct
>this one point of information.  The Miniscribe 3053 is a fairly high
>performance drive 44M 25msec access.  The 3650 is 40M 61msec access,
>probably the one you are confusing it with.

I'm not familiar with the Miniscribe 3053, but I do use a Quantum ProDrive40
SCSI daily. I've run the A2090 and FFS on a variety of ST506 and SCSI drives,
since we try to maintain a "representative sample" of the marketplace. The
Quantum literally screams in comparison to other drives at its nominal access.
It's up to 4 times faster than other SCSIs here (differential varies) and of
course leaves ST506 units standing still. The significant difference is its
cache buffer. A more telling performance comparison would have been for all
controllers working on the same drives.
-- 
========================================================================
  Joe O'Hara                ||  Comments represent my own opinions,
  Commodore Electronics Ltd ||  not my employers. Any similarity to
  Software QA               ||  to any other opinions, living or dead,
                            ||  is purely coincidental.
========================================================================