Date: Tue, 30 Apr 2002 21:48:23 +0100 (BST) From: Gavin Atkinson <gavin@ury.york.ac.uk> To: =?X-UNKNOWN?Q?S=F8ren_Schmidt?= <sos@freebsd.dk> Cc: <stable@FreeBSD.ORG> Subject: Re: DVD/DMA problems Message-ID: <Pine.BSF.4.33.0204302146430.20679-100000@ury.york.ac.uk> In-Reply-To: <200204302043.g3UKhFfi041888@freebsd.dk>
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On Tue, 30 Apr 2002, Søren Schmidt wrote: > It seems Gavin Atkinson wrote: > > Hi all, > > > > Attached verbose dmesg is of a box running -stable as of a week ago. The > > box has an IDE DVD-ROM drive as secondary master, which seems to fail when > > accessed with DMA enabled (using hw.ata.atapi_dma="1"). While trying to > > access the drive, the followsing errors are given: > > > > acd0: READ_BIG command timeout - resetting ... > > acd0: success setting UDMA2 on Acer chip > > acd1: success setting WDMA2 on Acer chip > > done > > Your drive probably doesn't do DMA right (lots of ATAPI drives doesn't > work with DMA even if they claim to)... That was my first assumption, but dual-booting the box into Windows seems to disprove this (DVDs can play at full speed, even copying files off them is 5-10x faster). Gavin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the messagehelp
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