Which RAID level uses parity data distributed to tolerate two-drive failures?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Enhance your understanding with the System Software, Architecture, Memory and Storage Test. Study with flashcards and multiple choice questions. Each question offers hints and detailed explanations. Prepare effectively for your exam!

Multiple Choice

Which RAID level uses parity data distributed to tolerate two-drive failures?

Explanation:
Two-drive fault tolerance comes from dual parity, distributed across all disks. Parity is extra information calculated from the data blocks that lets you reconstruct any missing data if a drive fails. In this setup, there are two parity blocks per stripe, so you can rebuild and continue operating even if two drives fail simultaneously. This means the array can survive two concurrent failures without data loss, though a third drive failure could be catastrophic. Other options either have no redundancy (RAID 0), rely on a single parity block that only tolerates one failure (RAID 5), or use mirroring that also tolerates only one failure in many configurations (RAID 1).

Two-drive fault tolerance comes from dual parity, distributed across all disks. Parity is extra information calculated from the data blocks that lets you reconstruct any missing data if a drive fails. In this setup, there are two parity blocks per stripe, so you can rebuild and continue operating even if two drives fail simultaneously. This means the array can survive two concurrent failures without data loss, though a third drive failure could be catastrophic. Other options either have no redundancy (RAID 0), rely on a single parity block that only tolerates one failure (RAID 5), or use mirroring that also tolerates only one failure in many configurations (RAID 1).

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy