Veritas Volume Manager (VxVM) operates as a subsystem between your operating system and your data management systems, such as file systems and database management systems. VxVM is tightly coupled with the operating system. Before a disk or LUN can be brought under VxVM control, the disk must be accessible through the operating system device interface. VxVM is layered on top of the operating system interface services, and is dependent upon how the operating system accesses physical disks.
VxVM is dependent upon the operating system for the following functionality:
operating system (disk) devices
device handles
VxVM Dynamic Multi-Pathing (DMP) metadevice
VxVM relies on the following constantly-running daemons and kernel threads for its operation: