Appeal No. 2002-2015 Page 7
Application No. 09/232,138
controller." Thus, although claim 6 requires that each HDA
contains at least one controller, we find no recitation that each
controller is responsive to the main PCB, or that the controllers
are adapted for performing a driving operation or a read/write
operation. We have revived the portions of Hatchett relied upon
by the examiner as a teaching of each HDA containing a
controller.
Hatchett discloses that controller board 17 provides the
required electronic circuitry to facilitate operation and control
of the HDAs 11 and 13 (col. 5, lines 18-22). Hatchett further
discloses (col. 6, line 58 through col. 7, line 6) that
For the purposes of the description of the controller
board 17, the two HDAs 11 and 13 will be referred to as
drive A and drive B, respectively. Each drive A, B is
electronically controlled by an interface micropro-
cessor, a servo control microprocessor, several logic
modules, digital/analog converters and various drivers
and receivers and associated circuitry. With the
exception of the data channel circuitry which is
mounted on a separate channel board 137 (as shown in
FIG. 6) for each drive A, B, all of the control
circuitry and components are mounted on the controller
board 17. While some of the components physically may
be shared by the two drives A, B for efficiency and
parts reduction, logically, the controller board 17 is
divided into halves, one-half A, 149, providing control
for drive A and the other half B, 151, provide control
for drive B.
Thus, with regard to independent claim 6, the issue is whether
the data channel circuitry on data channel board 137 for each
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