>Earlier today I swapped an Athlon (tbird) 850 and an Epox 8KTA3 in for the
>dual Celeron I had, moving all the cards into the new system. One of these
>was a Promise PDC20267 with 4 40gb disks attached. The machine would not
>boot; I assumed it was the i686-smp kernel and installed a Redhat
>7.0-provided i386 kernel. Several hours and a dozen or so boots later, it
>looks like when the bios on the PDC20267 is installed, the system hangs
>while booting at the point where it would probe C/H/S from the devices
>attached to the PDC20267 (they've already been identified by that point)
I see the same thing with an ASUS A7V133 motherboard that has a
PDC20265 installed on the motherboard. If I disable the PDC BIOS, the
system boots normally - but trying to use any UDMA mode hangs.
Ordinary mdma2 mode works fine.
So I suspect that the real culprit is the UDMA mode which the BIOS
probably enables - when I boot the the BIOS disabled, the device shows
up as running in pio mode.
All in all, I haven't had much success with the PDC controllers -
both cases I have tried will hang the system when enabling UDMA
(and there is no common hardware involved).
--
Henrik Storner | "ATA100 is another testimony to the fact that
<henrik@storner.dk> | pigs can be made to fly given sufficient thrust"
|
| Linux kernel hacker Alan Cox, on IDE drives
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