問題文
A finance team asks whether the mirrored array under their database protects them from a mistaken bulk delete performed by an application. Which answer is correct and explains why?
選択肢
- It does not, because mirrors only protect the boot volume.
- It does, provided the array has a spare member, because the spare is held out of the write path until a failure occurs and therefore preserves an older version of the data that can be promoted to recover from a logical mistake such as an accidental delete.
- It does not, because a mirror writes the same change to both members, so a delete is reproduced on every copy at the moment it happens.
- It does, because the second member lags behind by design and therefore still holds the state from before the delete, and the earlier copy can be read back from that member.