What RAID level is recommended for a database requiring minimal write requests, a large number of read requests, and fault tolerance?

RAID 5 is well-suited for scenarios requiring minimal write requests and a large number of read requests, along with the need for fault tolerance. This RAID level achieves fault tolerance by using a combination of striping (like RAID 0) and parity, which allows data to be recovered in case of a single drive failure.

The parity information is distributed across the drives, which means that even with one drive down, the data remains accessible. This setup is particularly beneficial in read-heavy environments, as the data can be read from multiple disks simultaneously, thereby improving overall read performance.

While RAID 10 offers the advantage of both redundancy and performance by mirroring and striping, it requires a greater number of disks and can be less efficient in terms of usable storage space compared to RAID 5. RAID 1 provides simple mirroring and excellent fault tolerance, but it does not offer the data efficiency and performance gains for read operations that RAID 5 does. RAID 0, although it provides high performance through striping, offers no fault tolerance at all since there’s no redundancy; a failure of any single drive results in total data loss.

Therefore, for a database scenario focusing on minimal write operations, high read operations, and fault tolerance, RAID