What is RAID, and why is it used?

What is RAID, and why is it used?

• A. RAID combines multiple drives but does not affect performance.
• B. RAID is a form of cloud storage service.
• C. RAID combines multiple drives to improve performance, redundancy, or both depending on the level (e.g., RAID 0, 1, 5, 6, 10).
• D. RAID is a backup software suite.

Answer: (C)

RAID is a way to use several hard drives together to create one larger storage system that can either run faster, be more reliable, or both, depending on the level you choose. The idea is to spread data across multiple disks in a controlled way so you can gain performance or protect against drive failures. This is why the best choice highlights that RAID combines multiple drives to improve performance, redundancy, or both, depending on the level. For example, some RAID levels stripe data across disks to boost speed (like faster read/write), while others mirror data to provide redundancy (so you can recover if a drive fails). Other levels use parity information to balance capacity, performance, and fault tolerance. It’s not cloud storage, and it’s not a backup software suite. RAID is about combining physical drives inside your own system to change how data is laid out and protected; it does not by itself create offsite copies or replace regular backups.

RAID is a way to use several hard drives together to create one larger storage system that can either run faster, be more reliable, or both, depending on the level you choose. The idea is to spread data across multiple disks in a controlled way so you can gain performance or protect against drive failures.

This is why the best choice highlights that RAID combines multiple drives to improve performance, redundancy, or both, depending on the level. For example, some RAID levels stripe data across disks to boost speed (like faster read/write), while others mirror data to provide redundancy (so you can recover if a drive fails). Other levels use parity information to balance capacity, performance, and fault tolerance.

It’s not cloud storage, and it’s not a backup software suite. RAID is about combining physical drives inside your own system to change how data is laid out and protected; it does not by itself create offsite copies or replace regular backups.