sd

说明：  //按柱面和磁道来读取磁盘数据,要求 Public Function ReadDisk(ByVal Cylinders As Long, ByVal Tracks As Long, db() As Byte) As Boolean
(//By the cylinder and the track to read the disk data, request Public Function ReadDisk (ByVal Cylinders As Long, ByVal Tracks As Long, db () As Byte) As Boolean)