Date: Sun, 19 Sep 2004 17:17:50 +0200 From: =?ISO-8859-1?Q?S=F8ren_Schmidt?= <sos@DeepCore.dk> To: Michael Nottebrock <michaelnottebrock@gmx.net> Cc: freebsd-current@freebsd.org Subject: Re: regression in ata/atapi wrt dma? Message-ID: <414DA31E.3090506@DeepCore.dk> In-Reply-To: <200409191627.19011.michaelnottebrock@gmx.net> References: <200409191627.19011.michaelnottebrock@gmx.net>
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Michael Nottebrock wrote: > I just noticed that one of my burners in my homebox isn't set to dma mo= de=20 > anymore on boot (hw.ata.atapi_dma=3D"1" is set in loader.conf.local): >=20 > acd0: DVDR <HL-DT-ST DVDRAM GSA-4081B/A104> at ata1-master UDMA33 > acd1: CDRW <HL-DT-ST RW/DVD GCC-4120B/2.02> at ata1-slave PIO4 >=20 > I dual-boot 4-STABLE on this box and there it is: >=20 > acd0: DVD-R <HL-DT-ST DVDRAM GSA-4081B/A104> at ata1-master UDMA33 > acd1: CD-RW <HL-DT-ST RW/DVD GCC-4120B/2.02> at ata1-slave WDMA2 This is the "new worldorder" for ATAPI devices. The default is now to=20 enable DMA if the device claims to support at least UDMA33, if not its=20 left in PIO mode. This is to avoid all the (old) sucky devices that=20 claims DMA but really doesn't work. If you need any modes beyond this, please use atacontrol. -S=F8ren
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