MID

Contains information that uniquely identifies a disk or other storage medium.

MID struc
    midInfoLevel   dw 0 
    midSerialNum   dd ? 
    midVolLabel    db 11 dup (?) 
    midFileSysType db 8 dup (?) 
MID ends

Members

midInfoLevel

Information level. This member must be zero.

midSerialNum

Serial number for the medium.

midVolLabel

Volume label for the medium. If the label has fewer than 11 characters, space characters (ASCII 20h) fill the remaining bytes in this member.

midFileSysType

Type of file system as an 8-byte ASCII string. This member can be one of these values:

FAT12	12-bit file allocation table (FAT)
FAT16	16-bit FAT
CDROM	High Sierra file system
CD001	ISO9660 file system
CDAUDIO	Audio disk

If the name has fewer than eight characters, space characters (ASCII 20h) fill the remaining bytes in this member.