In netbsd.help, jason wrote:
> Is the SCSI controller HPT370/372 UDMA/ATA100 RAID supported by NetBSD?

It is supported - at least as an IDE controller. I don't know where you got
the idea that it would be SCSI. It is not.

Regarding the RAID functionality: I seem to recall that these cards do
an (at least partial) software RAID, not a true hardware RAID.