An external HD enclosure permits massive amounts of storage, and under a SCSI regime, the SCSI data cable can be long enough to run from the workstation backplane to the enclosure.
With an Adaptec U160 SCSI controller with both internal and external (backplane) channels in which to address storage, as well as the ability to choose my boot drive from an adapter-generated boot menu, the adapter card permits a hardware-based multi-boot system, one OS per drive.
The plan is to mount five or six SCSI HDs in the enclosure, and then boot selectively (from the adapter-generated menu) using the drive containing the OS of choice.
Can anyone find a problem with mounting a standard 300-400W power supply in an old computer case, connecting the power supply HD cables to the SCSI drives, connecting the workstation SCSI adapter data cable itself (with at least six stations) to each of the enclosure HDs, and then-- in effect-- use two power supplies to serve the same workstation CPU?
The only difference from a standard setup is the external power supply, used because the enclosure would be farther away than would be practical to connect to the workstation PSU.