OneFS includes a Dynamic Sector Repair (DSR) feature whereby the file system can force bad disk sectors to be rewritten elsewhere. When OneFS fails to read a block during normal operation, DSR is invoked to reconstruct the missing data and write it to either a different location on the drive or to another drive on the node. This is done to ensure that subsequent reads of the block do not fail. DSR is fully automated and transparent to the end user. Disk sector errors and Cyclic Redundancy Check (CRC) mismatches use almost the same mechanism as the drive rebuild process.