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Allocating and Using Media

[Removable Storage Manager is no longer available as of Windows 7 and Windows Server 2008 R2.]

After you create and configure media pools, you can allocate media using the AllocateNtmsMedia function. This function returns a logical media identifier (LMID). Media can only be allocated by one application at a time. While in this allocated state, a cartridge is considered "in use" by your application may contain valuable data. When your application no longer requires the cartridge it must deallocate the media by calling DeallocateNtmsMedia. Once deallocated, a cartridge is available to for use by other applications. If the deallocated cartridge remains in your media pool then only other applications that have access to your pool can utilize it for their use. If the deallocated cartridge is returned to the free pool then any other application can utilize it.

To use a cartridge you call MountNtmsMedia, which places the cartridge in a drive. After this call, you can use standard I/O functions to read and write the contents of the media. Use the DismountNtmsMedia function to dismount the cartridge. The following list follows the path of functions you should use to access media in a RSM system.