Appeal No. 97-4408
Application No. 08/579,314
as in Katz, or in the reserved area of each data storage unit.
As pointed out by the examiner, at page 5 of the answer, page
3, lines 4-15 of the instant specification, in describing the
prior art, recites that it was well known to allocate reserved
areas in each data storage unit to store system configuration
information. Thus, artisans would have been well aware of the
capability to store various types of system information,
including time stamp, or other kinds of update information, in
these reserved areas.
With regard to the feature of updating the reserved area
for each logical group before updating the reserved area for
the next logical group, we agree with the examiner that the
explicit teaching of Williams of updating “serially, thereby
protecting against all volumes becoming corrupted at once”
[Williams abstract] would have made this feature obvious to
employ in Katz for the stated purpose set forth in Williams.
If updates were performed simultaneously, i.e., in parallel,
rather than serially, a power interruption would make it
difficult, if not impossible, to resurrect the data in storage
just prior to power interruption.
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