Which RAID level is best known for providing redundancy and improved read performance by striping data?

Which RAID level is best known for providing redundancy and improved read performance by striping data?

• A. RAID 0
• B. RAID 1
• C. RAID 5
• D. RAID 10

Answer: (C)

RAID 5 is known for providing a good balance of redundancy and performance due to its use of striping data across multiple disks with distributed parity. In a RAID 5 array, data is split into blocks and spread across various disks, which allows for improved read performance as multiple drives can be accessed simultaneously for read operations. Additionally, RAID 5 includes a parity mechanism, which means that if one disk fails, the data can still be reconstructed using the parity information stored across the remaining disks, providing redundancy. When a disk fails in a RAID 5 setup, the system can continue to operate, albeit in a degraded state, while the data is being rebuilt onto a replacement disk. This ability to maintain operation during a failure is a crucial advantage for environments that require high availability and data protection. The other RAID levels mentioned do not provide the same combination of features. RAID 0 offers no redundancy by only striping, RAID 1 duplicates data for redundancy but lacks the improved read performance found in striping, and RAID 10 (which combines striping and mirroring) does provide redundancy and performance but requires a minimum of four drives and is less storage-efficient compared to RAID 5. Thus, RAID 5 stands out as the optimal choice when

RAID 5 is known for providing a good balance of redundancy and performance due to its use of striping data across multiple disks with distributed parity. In a RAID 5 array, data is split into blocks and spread across various disks, which allows for improved read performance as multiple drives can be accessed simultaneously for read operations. Additionally, RAID 5 includes a parity mechanism, which means that if one disk fails, the data can still be reconstructed using the parity information stored across the remaining disks, providing redundancy.

When a disk fails in a RAID 5 setup, the system can continue to operate, albeit in a degraded state, while the data is being rebuilt onto a replacement disk. This ability to maintain operation during a failure is a crucial advantage for environments that require high availability and data protection.

The other RAID levels mentioned do not provide the same combination of features. RAID 0 offers no redundancy by only striping, RAID 1 duplicates data for redundancy but lacks the improved read performance found in striping, and RAID 10 (which combines striping and mirroring) does provide redundancy and performance but requires a minimum of four drives and is less storage-efficient compared to RAID 5. Thus, RAID 5 stands out as the optimal choice when