From owner-freebsd-questions  Wed Jun 24 08:20:57 1998
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Date: Wed, 24 Jun 1998 18:19:55 +0300 (EET DST)
From: Vallo Kallaste <vallo@matti.ee>
To: Robert Deuerling <deuerl@bugsy.indra.de>
cc: freebsd-questions@FreeBSD.ORG
Subject: Re: ncr scsi controller
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On Wed, 24 Jun 1998, Robert Deuerling wrote:

> Hi,
> 
> are there any "hidden" options to speedup / finetune the ncr
> scsi crontroller ?
> 
> ncr0 <ncr 53c875 fast20 wide scsi> rev 4 int a irq 11 on pci1:4:0
> (ncr0:1:0): WIDE SCSI (16 bit) enabled(ncr0:1:0): 10.0 MB/s (200 ns, offset 15)
> (ncr0:1:0): "COMPAQ ST34572W 0892" type 0 fixed SCSI 2    

***

Look at the end of /sys/i386/conf/LINT file. There are some SCSI_NCR_
options. Personally I use only SCSI_NCR_DFLT_TAGS=8 (max number of tags
was 16 as I remember). For the meaning of these tags search /sys/pci/ncr.c
file, it's a very well commented one.


Vallo Kallaste
vallo@matti.ee


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