Try the noscsi cheat code (F2 at boot up) and see if Knoppix can boot then.
Can't do that. This is a pure SCSI system. The cdrom is SCSI, as well as the hard drive...

Also have to tried have both cards in with other distros?
Currently it's running redhat 6.1 and works fine, but I want to see if a firewire card I bought will be recognized with a recent kernel before bothering with an upgrade.

I thought scsi you could chain drives, so why two cards?
You can, but I have 3 SCSI devices:
Wide CDROM (internal)
Ultra Wide Hard Drive (internal)
Wide Tape Drive (external)

Because the tape drive is external, I can't use both the internal and external Wide interface. It's only one or the other.

I have removed the scsi card for the tape drive and it boots fine, but I'd rather not have to do that.

Any other ideas?

Thanks,
Joe[/quote]