What is RAID 4?

Block-level data striping with dedicated parity drive.

• Minimum number of drives: 3 (Not widely used)
• Strengths: Data striping supports multiple simultaneous read requests.
• Weaknesses: Write requests suffer from same single parity-drive bottleneck as RAID 3; RAID 5 offers equal data protection and better performance at same cost.

RAID Levels instruction: RAID 0 - RAID 1 -RAID 2 - RAID 3 - RAID 4 - RAID 5 - RAID 0/1 (or RAID 10)

Types Of RAID: Hardware-based Raid | Software-based Raid