The f_getlabel function returns volume label and volume serial number of a drive.
FRESULT f_getlabel ( const TCHAR* path, /* [IN] Drive number */ TCHAR* label, /* [OUT] Volume label */ DWORD* vsn /* [OUT] Volume serial number */ );
FR_OK, FR_DISK_ERR, FR_INT_ERR, FR_NOT_READY, FR_INVALID_DRIVE, FR_NOT_ENABLED, FR_NO_FILESYSTEM, FR_TIMEOUT
Available when _USE_LABEL == 1.
char str[12]; /* Get volume label of the default drive */ f_getlabel("", str, 0); /* Get volume label of the drive 2 */ f_getlabel("2:", str, 0);