On Wednesday January 8 2003 07:40 pm, Stephen Kuhn wrote:
> append="idebus=66 ide0=ata66"
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Just like that - then rerun
> lilo and reboot - this "forces" the pci bus to 66 (if it can do it)
> and "forces" the IDE interface to ata66/ata100 (if it can do it)
> which would at least ensure it's not the drive that's causing Moz
> to puke it's guts out on simple tasks like downloading.
idebus=66 will just be ignored as the PCI bus is 33 Mhz on all 66
thru 166 Mhz front side bus systems, which is damn near everybody's
/usr/src/linux-2.4.21-pre2.1mdk/Documentation/ide.txt
(^ kernel-version)
"idebus=xx" : inform IDE driver of VESA/PCI bus speed in MHz,
where "xx" is between 20 and 66 inclusive, used when tuning chipset
PIO modes. For PCI bus, 25 is correct for a P75 system, 30 is correct
for P90,P120,P180 systems, and 33 is used for P100,P133,P166 systems.
If in doubt, use idebus=33 for PCI."
As you can see by my kernel version, it's very recent. It appears
this doc has been updated lately, but to my mind it's still too
vague. For those with older Pentiums or AMD's that run on a 66 Mhz
FSB, the pci (ide bus) is 66/2, or 33 mhz. For those with PII-350, or
K6-2's and newer that use a 100Mhz FSB, pci is 100/3=33mhz. For
133mhz FSB, it's 133/4=33mhz. The newest 166FSB systems, 166/5=33mhz.
Like I said, damn near everybody ;)
--
Tom Brinkman Corpus Christi, Texas
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