Appeal No. 1999-2747
Application 08/757,979
a desired line, as indicated by the address, in the contents
of the array, as indicated by the tag fields in the tag array
(specification, page 7, lines 15-20).
The MESI field Invalid flag is used to inhibit access to
a cache set for which one or more failures have been
determined (specification, page 7, lines 22-27). The data for
the selected line from the data array is output to multiplexer
(figure 2, numeral 52) where a selected set data is gated as
cache data out on a line (figure 2, numeral 54) under control
of encoder (figure 2, numeral 44) which encodes the output of
the comparator (specification, page 8, lines 10-14). If the
invalid flag in the MESI field is on, a corresponding set of
data in the data array is inhibited and will not pass through
the multiplexer to the cache data output line (specification,
page 8, lines 16-19).
Independent claim 20 is reproduced as follows:
20. A method for controlling operation of a storage
array after a failure comprising the steps of:
identifying a failing element in the storage array;
setting a flag to inhibit access to a portion of the
array accessed by the failing element; and
3
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