[ GLOSSARY DEFINITION ] Storage

RAID 1

Mirroring data across two drives so either can fail without data loss.

Full Definition & Technical Explanation

RAID 1 writes identical data to two drives, so either can fail without losing data. It sacrifices half the capacity for redundancy.

See RAID 5.

Where RAID 1 Matters

Frequently Asked Questions

What is RAID 1?

Mirroring data across two drives so either can fail without data loss.

What terms are related to RAID 1?

Related Storage terms include RAID, RAID 0.

Related Technical Terms

RAID
Redundant Array of Independent Disks — combining drives for speed or safety. Storage
RAID 0
Striping data across drives for speed, with no redundancy if a drive fails. Storage
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