It really ought not to page fault for a bad block. The file server
driver certainly recovers from bad block accesses, as I saw
quite a few on my server this summer. Unfortunately, as my
fake worm filled up, I have pulled the scsi drives from the server,
replacing them with IDE as the prices make it prohibitive to
work any other way. 70Gb SCSI drives are £450 +VAT here,
whereas 80GB IDE are <£80 +VAT. You can mirror the drives
and still spend less than half for the same capacity.

I still have SCSI in my terminal.

However, there are compatibility problems between 53c8xx
chips and PCI busses, which is nothing to do with Plan 9. I
certainly found that old controllers (53c810s) did not
work reliabuly in PCI 2.1 busses; bus faults I think. I guess
that the same issues could exist with a new controller and
an old motherboard, but I don't have any old motherboards
any more.

It is certainly supported hardware, but only if the hardware
is plugged into a compatible socket.