Date: Thu, 14 Aug 2003 07:42:59 +0200 (CEST) From: Soeren Schmidt <sos@spider.deepcore.dk> To: Maxim Konovalov <maxim@macomnet.ru> Cc: Alexander Serkov <serkov@ukrpost.net> Subject: Re: Why is ATAPI DMA disabled by default ? Message-ID: <200308140542.h7E5gxFL034186@spider.deepcore.dk> In-Reply-To: <20030814092542.G10062@news1.macomnet.ru>
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It seems Maxim Konovalov wrote: > > > I use 5.1-current and have found that by default FreeBSD disables ATAPI's > > support for DMA transfers and thus uses CPU hungry PIO modes. > > It even makes sysctl used to change this read-only. > > I had changed the default value of atapi_dma to 1 in dev/ata/atapi-all.c to 1 > > and it worked fine for me. > > Hint: put hw.ata.atapi_dma="1" in /boot/loader.conf. Or just use atacontrol to change the mode once the system is running... -Søren
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