Number of LUNs

Associated constant in the API stacks: MSC_MAX_LUN_NUMBER. (Not reported in the USB descriptors.)

This is the number of "logical units" contained in this USB device. A single MSC interface can contain multiple logical units, each of which the host OS mounts as a separate volume. For example, if two LUNs are fully implemented, then in Windows, two drives will be seen in "My Computer".

Adding this MSC interface only enables USB enumeration. The host will then attempt to enumerate each LUN the MSC interface says it has. To do this, the application must: