RAID 3 


![](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2Faafcb581-cf0c-4683-9ed0-c28bf5c9f412%2Ftemp.jpg?table=block&id=48020019-2481-4287-8a7e-3d635536caf4&cache=v2)
- RAID 3 - Striped set with dedicated parityidea of redundant disk to increase reliability - many disk decrease reliabilitybut update parity block overhead and bottle neck to parity disk