Lesson 3 of 4 · 35 min

Parity-Based Protection: RAID 4 and RAID 5

Describe how parity with XOR supports reconstruction after a disk loss, and compare RAID 4 and RAID 5 with respect to space savings, parity placement, and the impact of parity organization on write performance and parallelism.

Lesson explanation

Parity-Based Protection: RAID 4 and RAID 5 RAID is used to build a storage system that is faster, larger, and more reliable by using multiple disks together, as described in Chapter 38 and 44(1) (1). For parity-based protection, the key idea is to add redunda...

Read the full explanation