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Difficulty: EasyStorage Drives and RAID Array Issues

A technician receives a hardware monitoring notification indicating that a server's RAID 5 array is operating in a degraded state due to a single hard drive failure. Which of the following is the most appropriate immediate action to restore fault tolerance to the array?

  1. Replace the failed hard drive with a healthy drive of equal or greater capacity and rebuild the array.Answer
  2. B
    Format all remaining operational drives in the array and restore the data from a nightly backup.
  3. C
    Reconfigure the RAID array controller settings to RAID 0 to clear the degraded warning.
  4. D
    Reinstall the operating system storage drivers to reset the drive monitoring alert status.

Answer

Replace the failed hard drive with a healthy drive of equal or greater capacity and rebuild the array.
When a single drive fails in a RAID 5 configuration, the array enters a degraded state but remains operational by calculating missing data on the fly using parity stored on the surviving drives. Replacing the failed drive with a new, healthy disk of matching or greater capacity and rebuilding the array restores complete redundancy.

Step-by-Step Solution

1
Identify the failed disk from the RAID management tool logs.
The exact faulty drive slot is confirmed.
Ensures the correct drive is targeted for hot-swapping or replacement.
2
Insert a new, healthy drive of equal or higher capacity into the slot.
The new disk is detected by the RAID controller.
Provides the physical disk capacity required to rebuild missing striping data.
3
Initiate or confirm the automatic rebuild process for the RAID 5 array.
Parity data reconstructs the failed drive's data onto the replacement disk, restoring RAID fault tolerance.
Restores full fault tolerance and returns array status from degraded to optimal.

Key Concept

RAID 5 Degraded Recovery Procedure
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Topics

Storage Drives and RAID Array Issues

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