MediaScan’s role within OneFS is to check disk sectors and deploy the DSR mechanism described in Dynamic Sector Repair to force disk drives to fix any sector ECC errors they might encounter. Implemented as one of the phases of the OneFS Job Engine, MediaScan runs automatically based on a predefined schedule. Designed as a low-impact, background process, MediaScan is fully distributed and so can leverage the benefits of the OneFS unique parallel architecture.
