This structure is used to uniquely identify the medium in a drive. It is
used in the following IOCTL fns:
440dH 46H (set media ID)
440dH 66H (query media ID)
DvRq 13H (generic IOCTL for block devices)
IoctlMediaIdRec
Offset Size Contents
+0 2 wInfoLevel always 00
+2 4 lSerNo 32-bit volume serial number
+6 0bH abVolLabel 11-character text volume label, blank-padded
+11H 8 abFileSysID contains 'FAT12 ' or 'FAT16 ')
19H (25) size of an IoctlMediaIdRec
See Also: fn 440dH (Generic IOCTL for block devices)
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