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From: blgardne@javelin.es.com@bambam.UUCP (Blaine Gardner)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Hard disk transfer rates
Message-ID: <2434@bambam.UUCP>
Date: 22 Sep 90 16:15:55 GMT
References: <1938@lpami.wimsey.bc.ca> <2253@impch.imp.com>
Sender: news@bambam.UUCP
Organization: Evans & Sutherland Computer Corp., Salt Lake City, Utah
Lines: 32

rumbo@impch.imp.com (Peter Kunz) writes:

>>The best DiskSpeed performance figures I have seen on an A2000 are about 1.5
>>MegaBYTES/second.

>HOW????
>is this a bare bone a2000? 
>i have a standard a2000b with 4 megs 16 bit ram added, an a2091 and a quantum
>105s. after adding 256k of buffers to each partition i get 640 kb/s. can this
>be improved?

Sure, all you have to do is replace that pokey Quantum with something
like a 1.2 gigabyte Wren VII. The drive alone will only run you $5000 or
so. You might also get similar performance with the cheaper Wren VI or V
for only $3-4000.

As has been stated many times, you're only as fast as the slowest link
in the chain. The Quantum drives are FAR better than the cheaper
Seagates, but they do lag behind the megabuck drives in speed. The best
I've seen personally out of the Q105S is about 900K/sec (DiskSpeed 3.1)
on an A3000. On an A2000 with the A2620 card I've got about 800-850K/sec.

You'll never hit 1.5M/sec with the Quantum, but I would expect you could
get better than 640K/sec. Were you running the test on an unfragmented
(freshly formatted is best) partition? I've seen moderate fragmentation
cut DiskSpeed test results in half.

-- 
Blaine Gardner @ Evans & Sutherland  580 Arapeen Drive, SLC, Utah 84108
blgardne@esunix.UUCP                       BIX: blaine_g
{decwrl, utah-cs}!esunix!blgardne        
DoD #0046                               The Borg killed Laura Palmer!