ATA DMA issues - are there problems lurking in 7.1?

Gavin Atkinson gavin at
Wed Apr 29 13:31:37 UTC 2009

On Wed, 2009-04-29 at 02:48 -0700, Chris H wrote:
> Greetings,
> I have several Tyan S2518UGN (Thunder LE-T) server boards that I've
> been running for a few yrs. I've always used the SCSI on them, so never
> really used the ATA ports. I once experimented dual-booting NT2003 & FBSD
> on one of the ATA ports about a year ago. But ran into the problem I'm
> running into now. Back then I just blamed it on the drive (even tho it
> was brand new, and ran NT without complaints). But FreeBSD complains.
> So this is the story now; I'm trying it again - different drive, and using
> XP-SP3 & BSD. XP installs/runs w/o a hitch. I then install BSD on the
> second half of the drive, and make an entry into the XP boot loader.
> Reboot into the fresh BSD install - now the trouble begins...
> I periodically receive the following messages:

Can you provide a full verbose dmesg from the system online somewhere


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