Symantec Dynamic Multi-Pathing for Windows (DMPW) adds additional fault tolerance to disk storage by making use of multiple paths between a server/host computer and a disk in a storage array. DMPW manages the multiple paths so that the data on each of the array's disks is accessible to the server/host computer. If a path to a disk fails, DMPW automatically transmits data to and from the disk over an alternate path. The paths on an array are set up to work in two ways - either in Active/Active mode, which provides load balancing of the data between multiple paths, or in Active/Passive mode, in which only one path is active and any remaining paths are backups.

DMPW is implemented through Dynamic Multi-Pathing Device Specific Modules (DMP DSMs).