Which RAID configuration offers high fault tolerance and improved read performance?

Which RAID configuration offers high fault tolerance and improved read performance?

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

Answer: (C)

RAID 5 is a configuration that provides high fault tolerance and improved read performance by using a technique known as striping with parity. In a RAID 5 array, data is divided into blocks and spread across multiple disks. Parity information is also distributed among the disks, which allows the array to recover from the failure of a single disk without data loss. The combination of striping and parity means that while data is read from multiple disks simultaneously (improving read performance), it also has redundancy built in, enhancing fault tolerance. If one disk fails, the RAID controller can use the parity information to reconstruct the data from the remaining disks. However, it's important to note that RAID 5 does have a performance hit during write operations due to the need to calculate and write parity data. Other RAID configurations have different characteristics; for instance, RAID 0 does not provide fault tolerance at all, as it simply stripes data across disks without any redundancy. RAID 1 provides fault tolerance through mirroring but does not offer the same level of read performance as RAID 5 due to its reliance on duplication. RAID 10, while offering both fault tolerance and excellent performance through a combination of striping and mirroring, typically requires more disks and storage capacity than

RAID 5 is a configuration that provides high fault tolerance and improved read performance by using a technique known as striping with parity. In a RAID 5 array, data is divided into blocks and spread across multiple disks. Parity information is also distributed among the disks, which allows the array to recover from the failure of a single disk without data loss.

The combination of striping and parity means that while data is read from multiple disks simultaneously (improving read performance), it also has redundancy built in, enhancing fault tolerance. If one disk fails, the RAID controller can use the parity information to reconstruct the data from the remaining disks. However, it's important to note that RAID 5 does have a performance hit during write operations due to the need to calculate and write parity data.

Other RAID configurations have different characteristics; for instance, RAID 0 does not provide fault tolerance at all, as it simply stripes data across disks without any redundancy. RAID 1 provides fault tolerance through mirroring but does not offer the same level of read performance as RAID 5 due to its reliance on duplication. RAID 10, while offering both fault tolerance and excellent performance through a combination of striping and mirroring, typically requires more disks and storage capacity than