Which backup strategy specifically involves redundancy across multiple drives to prevent single-point failures?

Which backup strategy specifically involves redundancy across multiple drives to prevent single-point failures?

• A. On-site backups with a single drive.
• B. Cloud backup only.
• C. RAID arrays with multiple drives.
• D. Manual copy to USB stick once a month.

Answer: (C)

Redundancy across multiple drives is achieved with RAID arrays. RAID spreads data across several drives in a way that copies or encodes information so that if one drive fails, the system can continue operating and the lost data can be rebuilt from the remaining drives. This setup directly protects against a single hardware failure, which is what single-point failures refer to. In contrast, a backup on a single drive lacks redundancy; cloud backup relies on off-site copies but doesn’t provide local drive redundancy; and a manual monthly copy to a USB stick is infrequent and also lacks continuous protection. Keep in mind RAID improves availability and fault tolerance, but it isn’t a substitute for regular backups that cover deletion, corruption, or other non-hardware risks.

Redundancy across multiple drives is achieved with RAID arrays. RAID spreads data across several drives in a way that copies or encodes information so that if one drive fails, the system can continue operating and the lost data can be rebuilt from the remaining drives. This setup directly protects against a single hardware failure, which is what single-point failures refer to. In contrast, a backup on a single drive lacks redundancy; cloud backup relies on off-site copies but doesn’t provide local drive redundancy; and a manual monthly copy to a USB stick is infrequent and also lacks continuous protection. Keep in mind RAID improves availability and fault tolerance, but it isn’t a substitute for regular backups that cover deletion, corruption, or other non-hardware risks.