[vishnu]

It is a an AplleCD 300e Plus.

http://www.bitsavers.org/pdf/apple/broch...s-BW2P.pdf

Are these designed to be used only by Apple or they can be used by other systems? This is the question.

I'm just guessing, but since Apple Computer SCSI devices use the infamous Macintosh-specific "transfer instruction block," those Apple devices probably won't work on SGI workstations, or, for that matter, anything other than a Macintosh. Just more of Apple's typical "walled garden" philosophy. Their attitude has always been, if it's not an Apple, just go away. That said though, if Microsoft had ever stopped porting Office to the Apple operating system, Apple would have gone out of business 25 years ago.