Home > Data Protection > PowerProtect DD Series Appliances > PowerProtect DD Data Invulnerability Architecture: Enhancing Data Integrity and Recoverability > RAID 6: Double disk failure protection, read error protection
RAID 6 is the foundation for PowerProtect DD continuous fault detection and healing. Its powerful dual-parity architecture offers significant advantages over conventional architectures including RAID 1 (mirroring), RAID 3, RAID 4, or RAID 5 single-parity approaches. RAID 6:
Each storage shelf includes a global spare drive, which automatically replaces a failed drive anywhere in the Data Domain system. When the hot swappable failed drive is replaced by Dell, it becomes a new global spare. By comparison, once a single disk is down in the other RAID approaches, any further simultaneous disk error will cause data loss.
Any storage system of last resort must include the extra level of protection that RAID 6 provides.