data corruption is slightly orthogonal to data loss. If your filesystem silently corrupts some data in a way you don't notice, you might just replicate the cor

data corruption is slightly orthogonal to data loss. If your filesystem silently corrupts some data in a way you don't notice, you might just replicate the corrupted data to your backup system over time. And in that case you will still have lost it. Data loss - e.g. due to a disk failure - is a lot more obvious.