RAID 6
RAID 6 needs a minimum of 4 drives in the array and is similar to RAID 5 with the exception that there is second parity block stored within the array. This means that two drives in the array will need to fail before the data becomes inaccessible.
In the picture below, the block size would be equal to A1 and the stripe size would be equal to A1, A2, A3, Ap and Aq
Advantages and Disadvantages of RAID 6
The only real advantage is the extra fault tolerance, with a maximum of 2 simultaneous drive failures. Because of the extra parity calculations RAID is slightly slower than RAID 5
Free diagnosis, no data recovery, no fee
All data recovery work undertaken by MjM is under a Free diagnosis and a no recovery no-fee policy. If we can't recover your data, then there is no fee for you to pay.
If you have lost data or your drive has stopped working contact us now.