Abstract: Scalable switching fabrics can be used to implement high performance routers by employing multi-dimensional switching fabrics. But the fault probability of switching fabric also increases with the increase of components. A novel fault-tolerant algorithm on the mesh/torus, named as minimal misrouted adaptive routing (MMAR), is proposed based on deadlock recovery mechanism. According to the status of links around each fault-free node, MMAR can accommodate arbitrary shaped fault models using minimal number of virtual channels. When encountering concave fault models, through setting the position tables for the nodes within the concave regions at the surface nodes of each concave region, MMAR can minimize the length of the misrouted paths by avoiding routing the message into the irrespective holes. Performance results of a simulation on torus with 256 nodes are also given.