Appeal No. 2002-2015 Page 8
Application No. 09/232,138
drive, performs control functions. Although not brought to our
attention by the examiner, we find from our review of Hatchett
(col. 7, lines 50-56) that this issue is addressed by Hatchett,
who states that:
All data processing circuitry and logic including
coding for write and detection and decoding operations,
error detection and error correction is implemented on
a separate data channel board 137 (as shown in FIG. 6)
for each drive A, B coupled to its microprocessor via
lines 139A and 139B, respectively.
Hatchett continues (col. 7, lines 56-62) by stating
The interface microprocessor controls the transfer of
data between its respective drive A, B and the lost
[sic, host] computer system, read/write access of the
disk media and disk defect management and error
recovery. Additionally, the interface microprocessor
performs diagnostics and provides monitoring of the
spindle status.
From the disclosure of Hatchett, we find that even though all
data processing circuitry and logic including coding for write
and detection decoding operations, error detection and error
correction are implemented on data channel board 137, that it is
the interface microprocessor (on control board 17) that controls
the transfer of data, read/write access of the disk media and
disk defect management and error recovery, as well as diagnostics
and monitoring of the spindle status. Thus, we find that
Hatchett does not disclose control operations being performed by
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