What is the recommended process for replacing a degraded disk in ONTAP to avoid service interruption?

What is the recommended process for replacing a degraded disk in ONTAP to avoid service interruption?

• A. Power down the node and replace the disk.
• B. Disable I/O and replace the disk in hot-swap.
• C. Ignore the failure and continue operating.
• D. Identify the failed disk, replace with a spare in maintenance mode if required, let the RAID-DP rebuild occur automatically, and verify health after rebuild.

Answer: (D)

Replacing a degraded disk in ONTAP should be done in a non-disruptive way that leverages RAID-DP and hot-swapping. First identify the failed disk with the management tools, then swap in a spare. If required, place the failing disk into maintenance mode to detach it cleanly from the array. The RAID-DP controller automatically starts rebuilding data onto the spare, while I/O continues to be served by the healthy disks. After the rebuild completes, verify the health of the disk and the overall system. This approach avoids powering down the node and prevents unnecessary disruption, while restoring full protection and capacity once the rebuild finishes.

Replacing a degraded disk in ONTAP should be done in a non-disruptive way that leverages RAID-DP and hot-swapping. First identify the failed disk with the management tools, then swap in a spare. If required, place the failing disk into maintenance mode to detach it cleanly from the array. The RAID-DP controller automatically starts rebuilding data onto the spare, while I/O continues to be served by the healthy disks. After the rebuild completes, verify the health of the disk and the overall system. This approach avoids powering down the node and prevents unnecessary disruption, while restoring full protection and capacity once the rebuild finishes.