Boot problem: "ata0: resetting devices"

Kent Stewart kstewart at
Fri May 30 10:52:34 PDT 2003

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 Stewart
Richland, WA

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