Home > Data Protection > PowerProtect DD Series Appliances > PowerProtect DD Data Invulnerability Architecture: Enhancing Data Integrity and Recoverability > Fewer complex data structures
A traditional file system has many data structures (free block bit maps and reference counts, for example) that support very fast block updates. In a backup application, the workload is primarily simpler sequential writes of new data, meaning fewer data structures are required to support it. As long as the system can keep track of the head of the log, new writes do not touch old data. This design simplicity greatly reduces the chances of software errors that could lead to data corruption.