RAID is one of the most widely applied data-protection strategies in the world [23, 60, 61, 62, 63]. It has unique features compared with single disk access, such as file synchronization, recovery, etc. Therefore, it leads to some unique IO patterns compared with others. This chapter analyzes two examples based on RAID 5 from two application scenarios. Large differences are observed between two traces. This chapter also analyzes whether the workloads are suitable for SMR drives. In addition, some suggestions are provided in order to improve system performance.
The concept of a RAID ...
