Date: Fri, 30 May 2003 10:52:31 -0700 From: Kent Stewart <kstewart@owt.com> To: Rich Morin <rdm@cfcl.com>, freebsd-questions@freebsd.org Subject: Re: Boot problem: "ata0: resetting devices" Message-ID: <200305301052.31015.kstewart@owt.com> In-Reply-To: <p05200f2dbafd43e0d7ce@[192.168.254.205]> References: <p05200f16bafb423c7331@[192.168.254.205]> <200305301004.39445.kstewart@owt.com> <p05200f2dbafd43e0d7ce@[192.168.254.205]>
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On Friday 30 May 2003 10:25 am, Rich Morin wrote:
> At 10:04 AM -0700 5/30/03, Kent Stewart wrote:
> >No, you didn't understand. The ATA cards appear like a scsi to the bios.
> >To boot from an add in ATA card, you have to choose scsi boot.
>
> I'll look into this. However, I haven't seen any way to request this
> in the SETUP screens. Anything I should look for?
No, idea. The older machines could all boot from scsi but my in memory boot
experience is only with P-II or IIIs and AMD Athlon's or better. These
systems have scsi as a defined boot parameter.
I had something like a KT7A that was part of the flawed Southbridge set and I
had it using an ATA addin card. The mobo eventually died. My systems
typically have one HD per controller. They have 2 hooked up to the mobo and 2
to an addin. My buildworld speeds vary as much as 50% or more depending on
the setup.
>
> >You lose a lot of speed. My new ATA cards are all UDMA-133. Dma transfers
> > are always faster. PIO is set at something like 16MB/s. You only get so
> > many milliseconds of time for a each transfer block and dma is always
> > faster.
>
> So, it's definitely worth pursuing.
>
My definition of speed is a concept based on how long it takes for the prompt
to return after I press the enter key. A fast HD helps. This would be
especially true if you were following something other than a release because
a buildworld can take place much faster. Installing from a UDMA rated CD-ROM
is also much faster but that is also another parameter that you have to add
to /boot/loader.conf.. BNW, the parameter name is the same as the depricated
sysctl variables but the value has to be quoted (").
Kent
--
Kent Stewart
Richland, WA
http://users.owt.com/kstewart/index.html
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