This reduces processing overhead and can make for high aggregate data-transfer rates on reads. For writes, however, there is inevitable contention for the sole parity drive, making this RAID level relatively sluggish. RAID 5 One of the most popular RAID levels, RAID 5 is again block-oriented and based on the storing of parity information. Because RAID 5 eliminates the parity-drive bottleneck, it enhances write performance. And due to the independence of all the drives in the array, read performance is tops among true RAID levels.
Recovery following a disk failure is relatively slow, but reliable enough.
All in all, RAID 5 achieves an excellent balance between performance, data protection, and low cost.