Course Description

Data Protection with RAID

RAID, which stands for Redundant Array of Independent Disks, is a technology that combines multiple disk drives into a single unit to improve performance, increase storage capacity, and enhance data protection. There are various RAID levels, each offering different configurations and benefits.

One of the most common RAID levels is RAID 1, also known as disk mirroring. In RAID 1, data is duplicated across two or more drives, providing redundancy in case one drive fails. While RAID 1 offers excellent data protection by creating an exact copy of the data, it is not as cost-effective in terms of storage capacity as other RAID levels.

Another popular RAID level is RAID 5, which uses block-level striping with distributed parity. RAID 5 requires a minimum of three drives and provides a good balance between performance, storage efficiency, and data protection. In RAID 5, if one drive fails, the parity information stored across the drives can be used to reconstruct the lost data.

RAID 10, also known as RAID 1+0, combines disk striping and mirroring to offer both performance and redundancy. RAID 10 requires a minimum of four drives and provides high data protection along with improved read and write performance.

While RAID offers enhanced data protection and fault tolerance, it is essential to understand the different RAID levels, their advantages, and disadvantages to