)
Values for SFS control function:
 00h	"PACKET_SET_DISKINFO"	 set disk parameters
 01h	"PACKET_SET_KEYINFO"	 set keying information
 02h	"PACKET_SET_READONLY"	 select read/write or read-only
 03h	"PACKET_SET_DRIVENO"	 set drive number to mount
 04h	"PACKET_SET_MOUNTSTATUS" set mount status
 05h	"PACKET_SET_UNMOUNT"	 set/clear quick-unmount hotkey
 06h	"PACKET_SET_TIMEOUT"	 set/clear auto-unmount timeout