Path: utzoo!attcan!uunet!visdc!asdnet!randyt
From: randyt@asdnet.uucp (Randy Terbush)
Newsgroups: comp.unix.i386
Subject: Re: Adaptec 1542 kernel fine-tuning
Message-ID: <1990Jun28.150514.12847@asdnet.uucp>
Date: 28 Jun 90 15:05:14 GMT
References: <1990Jun24.133639.4261@nstar.uucp> <190@xstor.UUCP>
Organization: Advanced System Design - Boise, Idaho
Lines: 28

In <190@xstor.UUCP> billbr@xstor.UUCP (Bill Brothers) writes:

>larry@nstar.uucp (Larry Snyder) writes:

>>After playing with the various parameters in my kernel to tweak
>>the throughput - I have settled (for the time being) on the following:

>>#define AHA_BUSON       9 
>>#define AHA_BUSOFF      6

>Larry mentions his playing with the DMA rate. I would recommend running
>a DMA test with any configuration that is going to be used with real
>live data. Even one failure is not acceptable when it comes to my data.
>But what he says is true. If your machine can handle it, turning up
>the knobs dramatically improves performance.

I have been tuning my new 1542/ISC2.2 installation also.  Regarding
data transfer rates, I was told that UNIX is more tolerant of lost
data in copying due to its methods of file copying/checking, etc.
More so than other OS's such as DOS.

Is there any truth in this?

-- 
Randy Terbush, 711 Eastridge Place, Boise, ID  83712

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