Skip site navigation (1)Skip section navigation (2)
Date:      Thu, 9 Dec 2004 13:31:40 +0100
From:      Arjan Van Leeuwen <avleeuwen@gmail.com>
To:        Rob <spamrefuse@yahoo.com>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: hw.ata.ata_dma="0": can I do this during bootup at the loader prompt?
Message-ID:  <d86b487304120904316cbc2710@mail.gmail.com>
In-Reply-To: <41B83F43.3060102@yahoo.com>
References:  <41B7E193.4090807@yahoo.com> <d86b487304120903475c4e6cc0@mail.gmail.com> <41B83F43.3060102@yahoo.com>

next in thread | previous in thread | raw e-mail | index | archive | help
On Thu, 09 Dec 2004 21:04:19 +0900, Rob <spamrefuse@yahoo.com> wrote:
> Arjan Van Leeuwen wrote:
> 
> 
> > On Thu, 09 Dec 2004 14:24:35 +0900, Rob <spamrefuse@yahoo.com> wrote:
> >
> >>Hi,
> >>
> >>In /boot/loader.conf, I have
> >>   hw.ata.ata_dma="0"
> >>to prevent a WRITE_DMA failure crash at bootup.
> >>Unfortunately, this forces my UDMA100 harddisk to operate
> >>at PIO4 speed.
> >>
> >>There are patches flying around on this mailing list that might
> >>solve the problem. I'm very keen on testing such patches, but I
> >>should remove the line in loader.conf. However, if the patch does
> >>not work, I end up with an unbootable disk.
> >>
> >>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?
> >>
> >
> >
> > I'm not sure if I understand what you want, but you can use eg
> > 'atacontrol mode <channel> udma33 udma33' to set your hard drive to
> > UDMA-33 after the system has booted.
> 
> No, that's no option. The situation is this: I have a harddisk with FreeBSD
> 5.3, which fails to boot. It would boot if I had hw.ata.ata_dma="0" in
> /boot/loader.conf; however, that file is empty, so the bootup crashes
> with a WRITE_DMA failure when the kernel loads.
> 
> I can get at the bootloader prompt during the boot. What I want to know is:
> can I type something here that has the same effect as hw.ata.ata_dma="0" in
> /boot/loader.conf? Then I can continue loading the kernel.

Ah, ok, now I understand.

> set hw.ata.ata_dma=0
> boot

Arjan

> 
> 
> 
> Thanks,
> Rob.
> _______________________________________________
> freebsd-stable@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-stable
> To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"
>



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?d86b487304120904316cbc2710>