Comment 1 for bug 27446

 I have the same problem with hard drives attached to an on-board HPT370 IDE controller. Same type of errors
about I/O ports. This problem occurs with all the kernels since 2.6.15-7, I was able to boot with 2.6.15-6.
I'm not sure this is a kernel issue, maybe it's a initramfs or udev problem.

(Please could you change your summary with something more explicit, like "Kernel 2.6.15-9 won't boot on
promise or hpt ide controller", thanks)