SCO Unix SCSI Problem

[Eric Pederson]

We are running SCO Unix 3.2 with an Adaptec 1540A SCSI controller and two
Quantum SCSI drives.  We randomly get kernel error messages like the 
following:

	aha: Spurious interrupt
	aha: No controller response 0

After which the system dies.  Often this results in trashing the root 
file system and we have to restore from tape.  Has anyone else run into this
problem?  SCO seems to think the controller is at at fault but we are on
our second controller and the problem still occurs.