FATFS_LinkDriverEx() function
Links a compatible diskio driver/lun id and increments the number of active linked drivers.
Arguments
drv
pointer to the disk IO Driver structure
path
pointer to the logical drive path
lun
only used for USB Key Disk to add multi-lun management else the parameter must be equal to 0
Return value
Returns 0 in case of success, otherwise 1.
Notes
The number of linked drivers (volumes) is up to 10 due to FatFs limits.