Final answer:
RAID 6 is the RAID level that writes parity to two different drives, providing fault tolerance to the system even in the event of the failure of two drives in the array.
Step-by-step explanation:
The RAID level that writes parity to two different drives, providing fault tolerance even in the event of the failure of two drives in the array, is RAID 6.
RAID 6 is an enhanced version of RAID 5 that provides additional fault tolerance by using two parity blocks. These parity blocks are distributed across different drives in the array, ensuring that even if two drives fail simultaneously, the data can be reconstructed.
For example, in a RAID 6 array with six drives, two drives can fail without any data loss. The parity information stored on the remaining drives allows the system to rebuild the lost data and maintain the integrity of the array.