Why is RAID 0 not suitable for reliability?

Why is RAID 0 not suitable for reliability?

• A. It duplicates data across drives.
• B. It uses parity to protect data.
• C. It provides no redundancy; a single drive failure causes complete data loss.
• D. It requires hot spare drive.

Answer: (C)

RAID 0 focuses on speed by striping data across multiple disks, but it offers no redundancy. Because there’s no mirror or parity, there’s nothing to rebuild from if a drive fails. A single failed disk means the data can no longer be reconstructed, since pieces of each file are spread across all disks. So the entire array becomes unusable, which is why it’s not reliable. For contrast, mirroring duplicates data for fault tolerance, parity-based systems use parity to recover lost data, and hot spares automate rebuilding after a failure—none of which RAID 0 provides.

RAID 0 focuses on speed by striping data across multiple disks, but it offers no redundancy. Because there’s no mirror or parity, there’s nothing to rebuild from if a drive fails. A single failed disk means the data can no longer be reconstructed, since pieces of each file are spread across all disks. So the entire array becomes unusable, which is why it’s not reliable. For contrast, mirroring duplicates data for fault tolerance, parity-based systems use parity to recover lost data, and hot spares automate rebuilding after a failure—none of which RAID 0 provides.