Date: Tue, 10 Aug 2004 09:08:29 +0200 From: Stevan Tiefert <stevan.tiefert@freenet.de> To: freebsd-questions@freebsd.org Subject: Re: How to disable UDMA for HDD? Message-ID: <200408100908.29763.stevan.tiefert@freenet.de> In-Reply-To: <20040809151326.GW782@gentoo-npk.bmp.ub> References: <200408091110.40243.stevan.tiefert@freenet.de> <20040809151326.GW782@gentoo-npk.bmp.ub>
next in thread | previous in thread | raw e-mail | index | archive | help
On Monday 09 August 2004 17:13, Nathan Kinkade wrote: > On Mon, Aug 09, 2004 at 11:10:40AM +0200, Stevan Tiefert wrote: > > Hello, > > > > when I try to install FreeBSD 5.2.1 on my computer with HDD on > > ata0-master and CD-ROM on ata0-slave I got five interessting messages > > during the boot-process: > > > > ... > > ad0: 4124MB <SAMSUNG VA34323A> [8938/15/63] at ata0-master UDMA33 > > ad0: TIMEOUT - READ_DMA retrying (2 retries left) LBA=8446347 > > ad0: TIMEOUT - READ_DMA retrying (2 retries left) LBA=0 > > ad0: WARNING - READ_DMA interrupt was seen but timeout fired LBA=8446347 > > ad0: WARNING - READ_DMA interrupt was seen but taskqueue stalled > > LBA=8446347 > > > > then the computer stops and he resists in this state till now... > > OpenBSD "downgrades" this DMA-thing automaticly and the CD-ROM seems not > > supporting UDMA and I assume to set at bootphase 3 a device.hint but I > > don't know which one? > > > > With regards > > Mr. > > Stevan Tiefert > > Here are the two pertinent sysctl variables for your ATA hard disk and > CDROM, respectively: > > hw.ata.ata_dma: 1 > hw.ata.atapi_dma: 0 > > These variables are read only once the kernel has been booted, so if you > want to try setting them manually you'll have to put them into > /boot/loader.conf as something like: > > hw.ata.ata_dma=0 > > Nathan Hello Nathan, your tip was useful, but I "corrected" it: set hw.ata.ata_dma="0" Now it is possible to install FreeBSD! Thanks very much! Mr. Stevan Tiefert -- deltree /y c:\windows My suggestion to solve all your problems!
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200408100908.29763.stevan.tiefert>