What is MFS?
MFS is file system or database used by TiVo. Most file system is implemented in kernel or OS but TiVo uses it’s own file system that is implemented in user space. It’s organized much like a database with transaction logs. MFS is still not well understood but we know enough about the file system to be able to do reads and limited writes. Each object in the file system is assigned an ID called FSID. There are at least 4 type of objects in MFS. Stream (recordings), Directory, Database, File. All Stream objects are store in mfs media regions and all other types are stored in mfs application regions.
