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Difficulty: MediumStorage Drives and RAID Array Issues

A storage administrator receives an automated alert for a database server configured with a six-drive hardware RAID 6 array using enterprise NVMe SSDs. The controller utility displays a degraded status due to two drive failures occurring simultaneously, though volume data remains accessible. Which of the following actions should the technician take to restore complete fault tolerance while preserving data integrity? (Select TWO.)

  1. Replace both faulty NVMe SSDs with hot-swappable replacement drives of equal or greater capacity.Answer
  2. Initiate an online array rebuild using the controller management utility to recalculate dual-parity data.Answer
  3. C
    Re-initialize and reformat the degraded storage volume before re-adding replacement drives.
  4. D
    Convert the existing volume to a RAID 5 configuration to complete the rebuild using only one replacement disk.

Answer

The technician should replace both failed NVMe SSDs with compatible drives of equal or greater capacity and initiate an online array rebuild using the controller management utility.
RAID 6 uses dual-parity striping across drives, allowing the array to maintain operation and data accessibility even when two disks fail simultaneously. To fully recover array redundancy, the technician must replace both failed drives with compatible SSDs of equal or greater capacity and execute a controller rebuild operation to reconstruct dual-parity information.

Step-by-Step Solution

1
Identify array fault tolerance capability
RAID 6 utilizes dual parity, enabling it to sustain up to two simultaneous drive failures without data loss.
Understanding the RAID level determines whether data remains intact and what steps are needed to restore fault tolerance.
2
Replace missing physical capacity
Remove the two defective drives and insert matching or higher-capacity NVMe SSDs into the hot-swap slots.
New disks must be present before missing parity block information can be rewritten.
3
Execute parity rebuild
Trigger an online rebuild operation through the RAID controller utility.
Rebuilding recalculates missing block data onto the replacement disks, returning the array from degraded to optimal status.

Key Concept

RAID 6 Fault Tolerance and Degraded Array Recovery
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Topics

Storage Drives and RAID Array Issues

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