Prism Drive cloud storage is engineered for extreme data durability and integrity. Prism Drive provides eleven 9s object durability, protecting data against hardware failures and media errors. In addition, Prism Drive supports an optional data immutability capability that protects data against administrative mishaps or malicious attacks. An immutable object cannot be deleted or modified by anyone—including Prism Drive. Data immutability protects against the most common causes of data loss and tampering including accidental file deletions, viruses and ransomware.