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Date: Sun, 19 Oct 1997 23:43:41 -0700 (PDT)
From: Julian Elischer <julian@whistle.com>
To: Martin Nilsson <martin@filex.se>
cc: freebsd-hardware@FreeBSD.ORG
Subject: Re: FreeBSD and IDE drives
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The ide driver in 3.0 can detect and use ultra-dma via PCI.
that in the 2.2 series cannot.
(it is being ported to 2.2-stable for testing and will be merged back)


On Fri, 17 Oct 1997, Martin Nilsson wrote:

> How good are the IDE/ATA drivers in FreeBSD?
> 
> I'm running 2.2.1 on a 430TX based motherboard with a 4.3GB Quantum
> Ultra DMA harddrive. When I boot the system FreeBSD detects the PCI IDE
> controller but doesn't assign a driver for it, instead the IDE
> controller is detected and used when the ISA bus is scanned.
> 
> How fast is the communication between the drive and controller?
> The drive has a maximum thruput of about 10MB/s 
> 
> Would there be any benefit if the driver used the PIIX4 chip in DMA
> busmaster mode?
> 
> 
> 
> 		/Martin
>