Ooh, get rid of that UNIX file system unless there's some pressing need for it. Unless you're a UNIX guru, you should format your disks as Mac OS Extended -- that's the recommendation from Apple themselves, and I think you'll encounter numerous difficulties trying to operate on a UNIX partition.
I know it seems weird that OS X is UNIX based but performs better when the volume is NOT formatted as a UNIX partition, but that's the way it is.
Give it a re-format as Mac OS Extended and reinstall and see if that helps -- I'm sure it'll cure some of your ailments.
Also, check with the manufacturer or other members here -- some SCSI cards that shipped with B&W and Yikes! systems are not bootable, or require firmware or software updates to become bootable.