Home > Data Protection > PowerProtect DD Series Appliances > Dell PowerProtect Data Domain DD9410 and DD9910 > Fault avoidance and containment
The next step in protecting the data is to ensure that the data, which was verified to be correct, stays correct. Because the Data Domain file system was built to protect data as its primary goal, its design protects against errors that could put existing data at risk (see Continuous fault detection and healing for details). It accomplishes this through a combination of design simplicity, which reduces the chance of software issues in the first place, and several fault containment features, which make it difficult for potential software errors to corrupt existing data. PowerProtect Appliance systems are equipped with a specialized log-structured file system that has four important benefits: