What is RAID-DP and why is it preferred for NetApp storage?

What is RAID-DP and why is it preferred for NetApp storage?

• A. RAID-DP is a single-parity RAID scheme
• B. RAID-DP is NetApp's dual-parity RAID that protects against double-disk failures, increasing data protection in HDD/SSD arrays.
• C. RAID-DP requires SSD only
• D. RAID-DP is software-only with no hardware support

Answer: (B)

RAID-DP means NetApp’s double-parity RAID. It stores two parity blocks for each data stripe, which lets the system reconstruct data even if two disks fail simultaneously. This is important as disk sizes grow, because the chance of a second failure during a rebuild increases, making single-parity protection less reliable. NetApp ONTAP integrates RAID-DP across mixed media—HDDs and SSDs—so you get strong fault tolerance without resorting to mirroring all data. It isn’t limited to SSDs, nor is it software-only; it’s a built-in protection mechanism of the storage system that uses both hardware and software features to protect data. So, the reason RAID-DP is preferred for NetApp storage is that it tolerates two simultaneous disk failures, providing higher data protection and safer rebuilds across HDD/SSD arrays.

RAID-DP means NetApp’s double-parity RAID. It stores two parity blocks for each data stripe, which lets the system reconstruct data even if two disks fail simultaneously. This is important as disk sizes grow, because the chance of a second failure during a rebuild increases, making single-parity protection less reliable.

NetApp ONTAP integrates RAID-DP across mixed media—HDDs and SSDs—so you get strong fault tolerance without resorting to mirroring all data. It isn’t limited to SSDs, nor is it software-only; it’s a built-in protection mechanism of the storage system that uses both hardware and software features to protect data.

So, the reason RAID-DP is preferred for NetApp storage is that it tolerates two simultaneous disk failures, providing higher data protection and safer rebuilds across HDD/SSD arrays.