Date: Sat, 31 Jul 2004 13:39:06 -0400 (EDT) From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: Maxim Sobolev <sobomax@portaone.com> Cc: current@FreeBSD.ORG Subject: Re: Is there still sufficient reason for hw.ata.atapi_dma being 0 by default? Message-ID: <200407311739.i6VHd6pF053862@khavrinen.lcs.mit.edu> In-Reply-To: <410BB1FE.7050804@portaone.com> References: <410A3833.7030502@portaone.com> <410A47C7.1080808@DeepCore.dk> <410A9B58.8000502@mac.com> <410A9D77.4030703@DeepCore.dk> <410BB1FE.7050804@portaone.com>
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<<On Sat, 31 Jul 2004 17:51:42 +0300, Maxim Sobolev <sobomax@portaone.com> said: > Actually it was not looking like underruns. I had weird problems burning > RWs at 24x in PIO with three different burners - the burncd process just > hanged solidly at random position, only atacontrol reinit helped. > Machine was 100% idle (Celeron 2.4GHz). Switching to DMA33 solved the > problem. My Panasonic burner simply refuses to operate without DMA. It will (appear to) fail write commands if the transfer is not set up to use DMA. -GAWollman
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