IFSMgr_SwapDrives(
unsigned long VRP,
unsigned long drive1,
unsigned long drive2
)
This service is provided to allow the drive letters of the host and child volumes to be swapped. Some compressed volume drivers do this. The FSD that manages the host and child volumes is also notified of the drive change.
Note that this function does not need to differentiate between the parent and child drives. It is irrelevant which is which as far as swapping them is concerned.