Appeal No. 1999-0243
Application 08/434,457
references before him would have been motivated to modify
Greenberg's sector identification method by using a physical
sector disk attribute register as shown by Hikita, while using
the defective sector list on the sectors of the disk as disclosed
by Greenberg. These are two distinct modes of information
storage, and without Appellants' disclosure as a guide, it is not
apparent why one skilled in this art would modify the teachings
of Greenberg by changing only the physical sector number
information storage means and not the storage means of other
data. Similarly, it is also not apparent why one skilled in the
art who did adopt physical sector number information storage
means outside of the disk per se, would not adopt external
storage as taught by Hikita to the defect list, and place both
types of information on the same storage media.
In addition, the sole motivating factor presented by the
Examiner7 for combining the references is to enable a computer to
access a disk solely on the basis of logical addresses. This
motivation is contrary to Greenberg's approach which uses
cylinder data and physical sector numbers within the sector for
the derivations of logical sectors on physical sectors.
7
7 Answer, page 4.
8
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