Date: Sat, 11 Dec 2004 04:53:44 -0800 From: Erik Hollensbe <erik@hollensbe.org> To: freebsd-stable@freebsd.org Cc: Erik Hollensbe <erik@hollensbe.org> Subject: Re: hw.ata.ata_dma="0": can I do this during bootup at the Message-ID: <B122FD14-4B73-11D9-87CD-000A95D15614@hollensbe.org> In-Reply-To: <20041211120123.C9F7D16A4D6@hub.freebsd.org> References: <20041211120123.C9F7D16A4D6@hub.freebsd.org>
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>>>> It would be nice if I can set hw.ata.ata_dma="0" at the loader >>>> prompt during bootup, so that the system at least will boot from >>>> harddisk. Is that possible? >>> Yes, that's possible. Drop the loader to the prompt and do the >>> following: >>> set hw.ata.ata_dma=0 >>> boot >> >> btw: I have a similar problems, but not with the boot disc, but one of >> my data drives, thus I want ata_dma enabled for the other discs. >> >> I have to dispatch a >> >> atacontrol mode 1 foo UDMA33 >> >> to set this drive (slave on second controller) to UDMA33 (otherwise it >> would use UDMA100). But I have to do it before /etc/rc.d/fsck starts >> accessing the device. Right now I've added above line to the beginning >> of aforesaid script. >> Is there a nicer/better place to tell the kernel (don't like editing >> the >> rc-scripts). > > You can use /etc/rc.early for that. You'll have to create it if it > doesn't yet exist. Put 'atacontrol mode 1 foo UDMA33' in it, and it > should execute that command before mounting the drives. Note that you can put this in loader.conf as well - if you're having trouble booting the system to do it, boot to "safe mode" - should get you in. I have an old Aladdin V with a buggy UDMA chipset, and doing this fixed the problem rather nicely. -- Erik Hollensbe <erik@hollensbe.org>
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