From owner-freebsd-current  Wed Apr 12  2:53:48 2000
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Date: Wed, 12 Apr 2000 05:53:42 -0400 (EDT)
From: Trevor Johnson <trevor@jpj.net>
To: Jonathan Smith <jonsmith@dragonstar.dhs.org>
Cc: freebsd-current@FreeBSD.ORG
Subject: Re: Quickie question on UDMA/33
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> Western Digital Caviar hard drives that should support UDMA/33, as should
> the Chipset.
> 
> Both boot up, trying UDMA mode, throwing ICRC READ ERROR's then kick back
> down to PIO mode 4.

> Bios's are set to do auto-chose pio/dma modes.

There may be a BIOS option that will disable DMA entirely.

> I've resolved to simply adding in the rc to reset them to pio mode, to get
> it over with (but I still get the errors at boot-up prior to the rc doing
> them).
> 
> I simply use 'device ata' etc. forms in the knerel config.

You might try commenting out this option (if you're using it):

options         ATA_ENABLE_ATAPI_DMA    #Enable DMA on ATAPI devices
__
Trevor Johnson



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