SK0-003 · Question #12
A server configured with RAID 5 has recently suffered from two simultaneous disk failures. Which of the following would be required to bring the server back to operational status? (Select TWO).
The correct answer is D. Restore from back up E. Replace defective hard drives. A RAID 5 array can only tolerate a single drive failure, so two simultaneous failures result in data loss and require both physical drive replacement and a full restoration from a backup.
Question
A server configured with RAID 5 has recently suffered from two simultaneous disk failures. Which of the following would be required to bring the server back to operational status? (Select TWO).
Options
- ABreak mirror array
- BReplace cache battery
- CReplace hot standby
- DRestore from back up
- EReplace defective hard drives
How the community answered
(27 responses)- A19% (5)
- B4% (1)
- C7% (2)
- D70% (19)
Why each option
A RAID 5 array can only tolerate a single drive failure, so two simultaneous failures result in data loss and require both physical drive replacement and a full restoration from a backup.
Breaking a mirror array (RAID 1) is not relevant to a RAID 5 configuration experiencing a failure.
While a cache battery is important for RAID controller performance and data integrity during power loss, replacing it does not resolve disk failures.
A hot standby drive would automatically rebuild the array after a single drive failure, but it cannot address two simultaneous failures in a RAID 5 array as it only replaces one failed drive.
RAID 5 can only tolerate a single drive failure; with two simultaneous failures, the array is critically degraded and data is lost, necessitating a full restoration from a recent backup to recover operational status.
To rebuild the RAID 5 array and provide a functional storage volume, the two defective hard drives must first be physically replaced with new, functional drives.
Concept tested: RAID 5 fault tolerance and recovery procedures
Source: https://learn.microsoft.com/en-us/windows-server/storage/storage-spaces/understand-different-types-of-virtual-disks#parity-virtual-disks
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