問題文
A redundant array reports one member as failed on a mail server, and performance has dropped. The operator must decide what to do before replacing hardware. Which action is appropriate?
選択肢
- Confirm the array's current state and which member failed, and verify that a recent backup exists, because the array is running without its usual redundancy until the rebuild completes.
- Unmount the filesystem and leave it offline until the replacement arrives.
- Force the failed member back into the array, because re-adding the same member restores redundancy instantly without any rebuild, since the member's contents are still consistent with the rest of the array.
- Immediately remove the remaining members and re-create the array, because a degraded array cannot be repaired in place.