How does RAID-DP differ from traditional RAID?

Study for the NetApp Certified Technology Associate NS0-002 Exam. With detailed flashcards and multiple choice questions, including hints and explanations, you'll be well-prepared to ace your exam!

Multiple Choice

How does RAID-DP differ from traditional RAID?

Explanation:
RAID-DP is about how parity is used to protect data and how many disk failures can be tolerated. Traditional single-parity RAID (like RAID-5) writes one parity block for each stripe, so the system can survive one disk failure, but a second failure during rebuild often leads to data loss. RAID-DP, NetApp’s double-parity scheme, adds a second parity block so the array can withstand two simultaneous disk failures and still reconstruct all data. This increased resilience is the key difference from standard, single-parity RAID. It’s not about being software- or hardware-based, and it isn’t about triple parity. The defining feature is the two-parity protection that lets two disks fail without losing data, which is what makes RAID-DP NetApp’s approach to improving availability.

RAID-DP is about how parity is used to protect data and how many disk failures can be tolerated. Traditional single-parity RAID (like RAID-5) writes one parity block for each stripe, so the system can survive one disk failure, but a second failure during rebuild often leads to data loss. RAID-DP, NetApp’s double-parity scheme, adds a second parity block so the array can withstand two simultaneous disk failures and still reconstruct all data. This increased resilience is the key difference from standard, single-parity RAID.

It’s not about being software- or hardware-based, and it isn’t about triple parity. The defining feature is the two-parity protection that lets two disks fail without losing data, which is what makes RAID-DP NetApp’s approach to improving availability.

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