MID

MID STRUC

midInfoLevel dw 0 ;information level

midSerialNum dd ? ;serial number

midVolLabel db 11 dup (?) ;ASCII volume label

midFileSysType db 8 dup (?) ;file system type

MID ENDS

The MID structure contains information that uniquely identifies a disk or other storage medium.

Fields

midInfoLevel

Specifies the information level. This field must be zero.

midSerialNum

Specifies the serial number for the medium.

midVolLabel

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

midFileSysType

Specifies the type of file system, given as an 8-byte ASCII string. This field can be one of the following values:

Name Meaning

FAT12 12-bit file allocation table (FAT)
FAT16 16-bit FAT

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

See Also

Interrupt 21h Function 440Dh Minor Code 66h Get Media ID
Interrupt 21h Function 440Dh Minor Code 46h Set Media ID