Slight modification... HDs haven't replaced tapes yet. And probably won't for slow read but massive storage. They handle the functionality of general use with

Slight modification... HDs haven't replaced tapes yet. And probably won't for slow read but massive storage. They handle the functionality of general use with 20GB tapes but that's some ways off current multi-terabyte tapes. And those might increase storage capacity faster than HDs. So server OSs will have to maintain compatibility.