RAID

RAID (Redundant Array of Independent Disks) 

RAID (Redundant Array of Independent Disks) is a technology designed to combine several physical disk devices into one logical module. The main purpose of RAID is to improve fault tolerance and storage performance. This technology allows you to use multiple disks as a single unit, which provides protection against data loss in case of failure of one or more disks, as well as increases the speed of reading and writing data. 

Key benefits of RAID: 

• Fault tolerance: Depending on the RAID level, data can be saved even if one or more disks fail. 
• Performance: Combining multiple disks can significantly increase the speed of reading and writing data. 

RAID Levels: 

• RAID 0: Combines disks to distribute data and improve performance, but does not provide fault tolerance. 
• RAID 1: Creates mirrored copies of data across multiple disks, providing high reliability. 
• RAID 5: Uses checksum to recover data in case of disk failure, requires a minimum of 3 disks. 
• RAID 10: Combines the benefits of RAID 1 and RAID 0 for high reliability and performance, requires a minimum of 4 disks. RAID is used in a variety of environments, including servers and data centers, to provide reliable and efficient data storage.