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From: harding%b56vxg.dnet@kodak.com (JON HARDING)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Bridgeboard HD speed (aboot)
Message-ID: <1488@eastman.UUCP>
Date: 20 Nov 90 15:03:36 GMT
References: <1990Nov19.202344.13666@en.ecn.purdue.edu>
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In article <1990Nov19.202344.13666@en.ecn.purdue.edu>, galocy@en.ecn.purdue.edu (Keith B Galocy) writes...
> 
>I just bought a new 330meg SCSI for my 2091 controller.  It's really
>fast on the Amiga (15-17ms or so) but the partition I set up for my
>bridge card is dragging in a major way.  The ten meg partition I had
>(have) on my quantum is slow but acceptable.  I set up a 72meg partition
>on the new drive and partitioned it with fdisk to 32meg, 32meg, 8meg.  
>I've only used half of the first 32 meg and already it is nearly too slow
>to use.  Word Perfect 5.1 is ridiculous.  Anyway, I want to know if I'm 
>doing something wrong or if my pc partition is too big or my (probable 
>cause) Amiga partition is too large.  By the way, I've also got the 2630
>if that makes a difference.  Any insight would be greatly appreciated
>because I've been unable to use it...
> 
>						Thanks,  Keith.
> 
>-no trite sig.
I've tried every combination of file services on the Amiga and have found, as
one would expect, that separate drives on each "side" of the machine is the
best configuration for optimal performance.  On that note I must mention that
I ran SPINRITE on the PC hard disk and found that the optimal interleave was
five: you can specify this when you do a low level format or let SPINRITE do
it.  The 5 value versus the nominal 3 value will render a 510% increase in 
disk performance, (yes. Five times better.).  Of the file server schemes,
the Amiga partition on the PC side is much faster than the ABOOT scheme of
a PC partition on an Amiga side harddisk.  I also experimented with partition
placement and emulation on the amiga side without measurable improvement.
Some time ago I posted a request for any information on ABOOT scheme 
optimization, but so far haven't seen any.  We may be the only ones doing 
this stuff.
N 2 K Z J N 2 K Z J N 2 K Z J N 2 K Z J N 2 K Z J N 2 K Z J N 2 K Z J N 2 K Z J 
|	Jon Harding, N2KZJ	email: harding%b56vxg.dnet@Kodak.COM	      |
|		* I don't represent KODAK by word or deed. *		      |	
N 2 K Z J N 2 K Z J N 2 K Z J N 2 K Z J N 2 K Z J N 2 K Z J N 2 K Z J N 2 K Z J