Deduplication and data integrity
Hardening a storage system so that it has the resiliency that you need to remain operational through an I/O error, drive failure, or power failure is very difficult. The system should tolerate deletions, cleaning, rebuilding a drive, multiple drive failures, and power failures—all without data loss or corruption.
While always important in storage, it's an even bigger consideration in backup and archiving with deduplication. With deduplication solutions, there may be 1,000 backup images that rely on a single copy of source data. Therefore, this source data needs to be kept accessible, with a high level of data integrity.
We ensure data integrity in EMC Data Domain systems with the EMC Data Domain data invulnerability architecture, which tests recovery end to end—through the file system and to the disk platter—during each backup and recovery operation.