I use an onboard HPT372 RAID controller with kernel 2.4. With devfs
this shows up as /dev/ataraid/disc0/*.

Now I realize that devfs is being phased out of 2.6, however it still
works for most devices -- except ataraid, for example. Specifically,
there is a CONFIG_BLK_DEV_HPT366 but no CONFIG_BLK_DEV_ATARAID_HPT.
Presumably I could use it as a straight IDE device but not as a
hardware RAID.

This is a duel-boot machine, booted right off the raid, so software
raid (such as md) is out of the question.

I've googled to learn about this but haven't seen any real answers.
It is unclear whether hardware RAID on this device is usable with udev
or simply not supported at all.