Path: utzoo!attcan!uunet!tut.cis.ohio-state.edu!rutgers!mit-eddie!uw-beaver!tektronix!psueea!parsely!agora!billsey
From: billsey@agora.UUCP (Bill Seymour)
Newsgroups: comp.sys.amiga
Subject: Re: How to measure disk speed
Message-ID: <1600@agora.UUCP>
Date: 10 Aug 89 02:53:21 GMT
References: <473@tw-rnd.SanDiego.NCR.COM:
Organization: Advanced Solutions, Hillsboro, OR
Lines: 32

From article <473@tw-rnd.SanDiego.NCR.COM:, by johnl@tw-rnd.SanDiego.NCR.COM (John Lindwall):
: When Supra quotes 326K/sec (on the A500 interface in their full page ads in
: AmigaWorld) do they use disperf or what?  I assume they kludge it to get
: the best results (buffers = 100K?!? maybe).

	They're either using Diskperf or Diskperf2. Note that Diskperf2 
*does* give higher values than the original Diskperf. Diskperf2 also does
a speed check with 256K buffers... I imagine they're also testing with the
2 meg memory board onboard also. You will get better speeds with real fast
mem than your will with just c00000 mem and chip mem...

: A question for Supra owners: has anyone tried to up the MaxTransfer value?
: The Supra software sets it to 64K, but I believe a larger number (or none if
: possible) would provide faster performance.  Is it reliable?

	I played with that for a while several months ago. You get slightly
better speeds with slightly larger MaxTrans, but not significant improvements.
The 64K MaxTrans is in their because their DMA card for the 2000 needs it,
and they use the same software for all their cards. Feel free to change
the MaxTrans on your 1000 to whatever you want.

: Thanks for listening to my rambles.
: 
: 
: ----------------------------------------------------------------------
: 	"Above opinions are my own, not my employer's"
: John Lindwall				 johnl@tw-rnd.SanDiego.NCR.COM
-- 
     -Bill Seymour             ...tektronix!reed!percival!agora!billsey
                               ...tektronix!sequent.UUCP!calvin!billsey
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