For the oldsters like me who’ve been around the backup world for a long time, we remember when tape was the only game in town. I even remember flash-in-the-pan technologies like tape RAID, which was an attempt to get backups going faster. There were a lot of good reasons to move backups to disk instead of tape: faster backup and restore, direct access vs. linear access to files, and you can do fancy stuff like spin up full system recoveries right from the backup repository (Catalogic invented that, by the way!). The move to disk was so strong that many organizations ended up getting rid of tape altogether. But have we gone too far in the disk direction?