"As a final word on performance, try to avoid putting CDROM's, ZIP drives etc on the SAME SCSI bus as your Hard drives. It will affect your Hard drives speed. As you have the 4000T, slap CDROM's, Zip drives, scanners etc onto the A4000's onboard SCSI and then your Hard drive(s) on the CS."
Wise advice, but I think you meant to say onboard IDE bus, not onboard SCSI... As the A4000 has no built in SCSI bus. Hook the SCSI Hard Drives up to the cstorm as mentioned and terminate BOTH ends of the bus with ACTIVE termination! DO NOT (REPEAT, DO NOT) use "termpwr" or any other built-in scsi termination on ANY scsi device for termination of the cyberstorm SCSI bus! You must have a 4 position SCSI II/III 68pin passthru cable to use the cyberstorm SCSI bus (one to connect the cyberstorm, one for the hard drive, and two for the active terminators at each end). For two hard drives, you need a five position cable, three drives, six position, etc... Make sure the drives all have internal termination disabled. Then, as you mentioned, avoid connecting removable media devices such as tape drives, zip drives, or cd roms to the cyberstorm bus. Either get el-cheapo IDE versions of these devices and hook them to the IDE port on the A4000 motherboard OR get an additional Zorro II/III SCSI controller and hook your (slower) removable media drives to the Zorro scsi card.