David Lang wrote:
that would only tell you that what you have is garbage (and you need to restore from backup(, useing a ECC costs some space, but lets you recover from some errors without having to resort to backups.
ECC permits you to recover from very specific, very-limited-damage scenarios like bit errors.
On modern hard drives, single-bit data corruption is very very very rare (particularly since ECC is already employed on the platter).
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