Which statement about RAID levels is true?

Which statement about RAID levels is true?

• A. They provide only data redundancy.
• B. They provide data redundancy and/or performance improvements.
• C. They are a type of memory.
• D. They replace the CPU.

Answer: (B)

RAID levels describe how multiple disks work together to store data with the aim of either protecting it from disk failures or speeding up input/output, or both. Some configurations provide redundancy through mirroring or parity so you can recover from a drive failure, while others improve performance by striping data across disks. Because of this mix, RAID is about redundancy and/or performance improvements, not memory, and it doesn’t replace the CPU.

RAID levels describe how multiple disks work together to store data with the aim of either protecting it from disk failures or speeding up input/output, or both. Some configurations provide redundancy through mirroring or parity so you can recover from a drive failure, while others improve performance by striping data across disks. Because of this mix, RAID is about redundancy and/or performance improvements, not memory, and it doesn’t replace the CPU.