Data Invulnerability Architecture

Data Domain Deduplication Storage Core Technologies Provide the Ultimate in Data Integrity and Recoverability

What happens when your data protection storage system fails? Data Domain's Data Invulnerability Architecture lays out the industry’s best defense against data integrity issues, by providing unprecedented levels of data protection, data verification, and self-healing capabilities that are unavailable in conventional disk or tape systems.

DATA INVULNERABILITY WHITE PAPER>

Key areas of data integrity protection include:

• End-to-End Verification at Backup Time
  > Data is read after it is written and verified that it is the correct data and that it is reachable through the file system to disk.
  > Most restores happen within a day or two of backups. Systems that verify/correct data integrity slowly over time will be too late for most recoveries.
  

• Fault Avoidance and Containment
  

  > New data never overwrites good data.
  > Fewer complex data structures.
  > NVRAM for fast, safe restart.
  > No partial stripe writes.

• Continuous Fault Detection and Healing
  > Data Domain RAID 6 provides double disk failure protection and read error correction.
  > On-the-fly error detection and correction.
  > Scrubbing to find and repair grown defects on the disk before they can become a problem.

• File System Recoverability
  > Data is written in a self-describing format. If necessary the file system can be recreated by scanning the log and rebuilding it from the metadata stored with the data.

Backups are the data store of last resort. Data Domain’s Data Invulnerability Architecture provides extra levels of data integrity protection to detect faults and repair them to ensure backup data or recovery is not at risk.