Format of Ontrackr_Ref_Data structure:
Offset	Size	Description	)
 00h	WORD	Size of structure (33h)
 02h	BYTE	VxD Chain mode
 03h 12 BYTEs	Drive 1: Ontrackr_VxD_Data structure (see #00299)
 0Fh 12 BYTEs	Drive 2: Ontrackr_VxD_Data structure
 1Bh 12 BYTEs	Drive 3: Ontrackr_VxD_Data structure
 27h 12 BYTEs	Drive 4: Ontrackr_VxD_Data structure (see #00299)
SeeAlso: #00297,#00299