Backup is never current, and it takes time to restore. RAID has its place. So much so, in fact, that there are now erasure-coded distributed filesystems at Goog

Backup is never current, and it takes time to restore. RAID has its place. So much so, in fact, that there are now erasure-coded distributed filesystems at Google and elsewhere, reliably storing exabytes of data on super shitty disks.