Xref: utzoo comp.unix.i386:664 comp.unix.xenix:7917
Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!ndcheg!ndmath!nstar!larry
From: larry@nstar.UUCP (Larry Snyder)
Newsgroups: comp.unix.i386,comp.unix.xenix
Subject: Re: Mylex SCSI Controller, 16550A UARTS
Summary: Disk Throughput
Message-ID: <111044@nstar.UUCP>
Date: 5 Oct 89 12:00:28 GMT
References: <111016@nstar.UUCP> <707@fiver.UUCP> <2834NU013809@NDSUVM1> <1989Oct4.141820.21930@ddsw1.MCS.COM>
Organization: The Northern Star, Notre Dame, IN, USA
Lines: 27

> Sure, some OPERATING SYSTEMS can't keep up.  That's true of VMS too, you
> know.  386/ix, in particular, is supposed to be a real screamer (we don't
> use it here for completely different reasons related to support).  SCO isn't

Have you done any benchmarks with SCO Unix 3.2?

> quite as fast as the hardware; I'd admit that I have a darn hard time
> getting better than 400KB/sec out of Xenix through the raw I/O interface.
> That is something that needs to be taken up with the software vendor.

What utility are you using to benchmark disk I/O under Xenix?

> Every one of our RLL-based machines can do in the area of 700KB/sec raw I/O.

Using which WD controller?

> If we sell a 386 system with an RLL interface, you can bet we'll guarantee
> that the raw I/O rate, measured with something like CORETEST (gotta define
> the benchmark in order to be meaningful), is from 630-700KB/sec.  ESDI

Every 2372 I've seen bench outs between 650-690KB/sec.  Why the WD over the
2372?

-- 
Larry Snyder                     uucp:iuvax!ndcheg!ndmath!nstar!larry
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