RAID Configuration Levels and Fault Tolerance

Which RAID configuration level provides fault tolerance but not an increase in performance using only two disks?

1) RAID 0
2) RAID 1
3) RAID 5
4) RAID 6
Final answer: RAID 1 provides fault tolerance but not performance increase with two disks.

Answer:

The RAID configuration level that provides fault tolerance but not an increase in performance using only two disks is RAID 1. It duplicates data on both disks, providing redundancy if one disk fails.

RAID 1, also known as Mirroring, duplicates the same data on both disks. This setup allows for fault tolerance, meaning if one disk fails, the other can still provide all the data. However, it does not increase performance because it doesn't distribute data across multiple disks.

For performance improvement, you would need a RAID configuration like RAID 0, RAID 5, or RAID 6 where data is spread across multiple disks, allowing for simultaneous reads and writes.

RAID 1, also known as mirroring, involves creating an exact copy of data onto two disks. This provides redundancy, meaning that if one disk fails, the data can still be accessed from the other disk.