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From: thad@cup.portal.com (Thad P Floryan)
Newsgroups: comp.sys.amiga
Subject: Re: RE: GVP
Message-ID: <21460@cup.portal.com>
Date: 20 Aug 89 04:25:15 GMT
References: <0417.AA0417@sosaria> <21380@cup.portal.com>
  <816@pccuts.pcc.amdahl.com>
Organization: The Portal System (TM)
Lines: 59

Re:

In article <21380@cup.portal.com> thad@cup.portal.com (Thad P Floryan) writes:
>Confirming Chris Brand's comments about the Quantum drive:
>
>the Quantum ProDrive 80S with FFS using Supra's Series-II software operated
>with the Supra 4x4 host adapter on an A1000 is getting 655Kbytes/sec reads
>and 262Kbytes/sec writes with the "original" DiskPerfA program.

Tony Sumrall writes:

"	YOW!  What version of the Supra software are you using and have you
	diddled MAXTRANSFER or anything like that?  I've a Quantum 40 megger
	using 1.06b Series II software and am only getting a little over 300K
	reads.  No mem in the Supra but I do have a Starboard II hanging out
	there with the controller. 
"

Uhhh, as Art Walker just reminded me, I neglected to mention I also have the
Ronin Hurricane card in the system.  Just to clear the air, my lab system
configuration is:

	A1000 with 512KB "chip" RAM
	Ronin Hurricane 68020 @ 14.32 MHz
	Ronin Hurricane RAM, 4MB
	Comspec AX2000 RAM, 2MB
	Supra 4x4 SCSI Host Adapter (NO internal RAM)
	2 A1010 external 3.5" floppies
	1 A1020 external 5.25" floppy
	various HDs and other stuff on the SCSI bus

System software is "stock" Amiga Enhancer version 1.3, using FFS.  The Supra
software is their Series II, version 1.09.  The "SupraMount" is on the first
line in the startup-sequence, so HD buffers are allocated into 16-bit fast RAM;
it's not until much later in the startup-sequence the Ronin AddMem for the
32-bit-wide RAM is invoked.

The Quantum 80S were just manufactured last week; date codes on most of the IC
chips are 8929 (29th week of 1989), so these are the latest production; even
have the "Apple" logo-sticker on the back of the drives.

All my tests were conducted by simply booting using my everyday Workbench disk,
then manually entering either "sys:autotest/autotest dh50:" or
"sys:diskperf/apr87/diskperfa dh50:" and recording the results.  No funny stuff
or other special setups were done (i.e. I did *NOT* do any optimal programming
of the Quantum DisCache (tm)).  The MAXTRANSFER is the Supra default of 65024.
The test results are reproducible on several of my systems, and anyone wishing
to stop by my office is welcome to witness a "run" for themselves.

Since I do have the Quantum OEM and Product manuals, I do intend doing some
experimenting to see just how much "tweaking" can be done with these drives on
my Amigas.

As a side note, the Quantums have replaced all the ^$%@&^%$& Seagate ST-251
drives which have gone belly-up with stiction problems; the Seagates have been
relegated to doorstop, paperweight, and toilet-tank-water-displacement duty
(we are still having a water shortage in N. California).

Thad Floryan [ thad@cup.portal.com (OR) ..!sun!portal!cup.portal.com!thad ]