Promise Ultra ATA 66 controller vs. FC1

Robert D. Arendt rda at rincon.com
Fri Jan 23 18:18:30 UTC 2004


Steve Saady wrote:
> I have a Promise Ultra 66 eide controller, but think it is only being 
> acessed at 33 Mhz.  I have looked around, but have not found how to 
> ascertain what rate Fedora is using it at.
> Is there a way to configure FC1 to use it at 66MHz?
> 
<snip>
> 
> dmesg|more :
> ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
> 
I added idebus=66 to /etc/grub.conf, so my boot line now looks like:
   kernel /vmlinuz-2.6.1-1.53smp ro root=LABEL=/ apm=off idebus=66
should work with the nominal FC1 kernel as well.  Really boosted my
disk I/O speed.

Hope this helps,
-Bob Arendt





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