Understanding RAID: Levels and Benefits

What does RAID stand for?

• Random Access Integrated Disks

• Redundant Array of Independent Disks

• Rapid Access Information Data

• Reliable Array of Internal Drives

Which RAID level is known for striping data across multiple disks without any redundancy?

• RAID 0

• RAID 1

• RAID 2

• RAID 3

What is the primary benefit of using RAID in a storage system?

• Increased power consumption

• Improved data reliability and/or performance

• Reduced storage capacity

• Slower data access

Which of the following is a characteristic of RAID?

• Uses only a single disk

• Combines multiple disks to act as one logical unit

• Decreases data transfer speed

• Eliminates the need for backups

What is a major disadvantage of RAID 0?

• Reduced storage capacity

• No data redundancy; if one disk fails, all data is lost

• Slow write performance

• Expensive to implement

Which RAID level mirrors data across two or more disks?

• RAID 0

• RAID 1

• RAID 2

• RAID 3

What is an advantage of RAID 1?

• Increased storage capacity

• Data is duplicated, providing high fault tolerance

• Data is striped for maximum speed

• Uses less hardware than other RAID levels

Which of the following is a disadvantage of RAID 1?

• No data redundancy

• Only one disk can be used at a time

• Storage capacity is halved due to mirroring

• Slow read performance

RAID 2 uses which of the following for error correction?

• Parity bits

• Hamming code

• Mirroring

• Striping only

What is a disadvantage of RAID 2?

• Requires special hardware and is rarely used

• No data redundancy

• Only supports two disks

• Cannot recover from disk failure