What does the disk status Degraded mean for RAID management?

What does the disk status Degraded mean for RAID management?
A . The hard drive is no longer being used by the RAID controller.
B . One or more drives are missing from the FortiAnalyzer unit.
C . The device is writing data to the disk to restore the volume to an optimal state.
D . FortiAnalyzer determined that the parity data in the disk is not valid.

Answer: A

Explanation:

When the RAID status is Degraded, it typically indicates that one or more drives in the RAID array have failed or are missing, causing the RAID array to operate with reduced redundancy. In this state, the array is still functioning, but it’s at risk because the fault tolerance provided by RAID is compromised.