SCSI (short for Small Computer System Interface) was a standard interface published by ANSI in 1986.
In the context of making electronic music in the 1980s and 1990s, it was chiefly used by samplers to talk to storage devices such as hard drives and CD-ROM drives, to store tens or hundreds of megabytes of samples, and load and save them faster than a 3.5" floppy disk drive could, let alone SysEx messages over MIDI.
A SCSI bus supports up to eight devices, including the host itself and up to seven peripherals.<!— It also has LUNs, which only the S950 supports. Still, that's a small consolation, as 60 MB × 8 LUNs = 480 MB, still smaller than the S1000's 512 MB. Given the S1000's partitions are up to 60 MB each, they seem to be LUN-equivalent, only with more than 8 allowed. Or Maybe I'm misinterpreting the whole thing, and that 60 MB drive has to contain all eight LUNs? —>
Studio infrastructure: ACSI | CV/gate | DIN sync | Eurorack | MIDI | SCSI | Tape sync | Tracks and channels