Compatibility: 3.2+
Expects: AX    440dH
BX    drive (0=default, 1=A, 2=B, etc.)
CL    41H
CH    08H (device category: block device)
DS:DX addr of an IoctlRdWrtTrackRec identifying the size and
memory address of the block to write and disk location.
Returns: AX    error code  if CF is set to CY
Info: Writes an entire trackful of data to a disk.  This could be used
as part of a system to duplicate the entire contents of a disk.

Carefully fill the IoctlRdWrtTrackRec with all the information
needed before calling.  You may use Fn 440dH 60H (query device
parameters) to obtain information about a track on the specified

See Also: Fn 44H (IOCTL)
Fn 440dH (generic IOCTL for block devices)
Fn 440dH 60H (query device parameters)
Fn 440dH 61H (read disk track)
Fn 440dH 62H (verify disk track)
- -

DOS Fn 440dH CL=41H: IOCTL Write Track on Logical Drive