Discs haven't superseded mag tape. The cost factor is with the disc, but in streaming mode tape can beat a spinning disc in speed of writes. Not only that, you might be surprised at how robust the tape market has become since defense in depth backup strategies were developed in the wake of cheap,reliable discs. Of course, it is all about to change again as Flash becomes cheaper and more reliable.

If your tape breaks, you can splice it, losing only certain files. Solid state memory and optical disks do not have that option.

[Bismarck] Don't they splice themselves?

Spectacular thunderstorm here. Some of the lightning made the scene look like daylight. Not all that much rain, surprisingly.

What Rosie said, but with a very hefty downpour of rain followed by a few hours of drizzle.

[Rakk] My understanding is that discs can recover lost blocks if they are in the right sort of configuration, and Flash has hardware redundancy built-in for its peculiar fail modes, so I guess the answer is "Yesnabe".

But in order to get the sort of speed and reliability from spinning discs that tape offers (in streaming mode - important specific there) you have to "waste" a lot of discs. Personally I think tape is neat just because of the robot silos. Technology should have moving parts to provide visual interest. Today's tech is all solid state in boring boxes. Some years ago I toyed with the idea of using tiny motors like the ones in toy helicopters to drive lightweight gear trains, the whole on an appliqué that could be stuck to a tower casing to make it look like it was doing useful stuff. Might still try that.