Appeal 2007-1352
Application 10/406,127
storage transactions for which data storage in the
non-volatile memory of both the first and second
cache have not been completed, where a record in
the list is created prior to the storage of either the
first copy of data or the second copy of data in the
first cache and in the second cache, respectively,
the list being arranged to be cleared of records
corresponding to cache data storage transactions
for which data storage in the non-volatile memory
of both the first and second cache have been
completed.
7. A method for operation of a cache memory
system including a first cache comprising non-
volatile memory for storing a first copy of data, a
second cache comprising non-volatile memory for
storing a second copy of said data, and additional
non-volatile memory associated with at least one
of the first cache and the second cache for storing a
list of ongoing cache data storage transactions for
which data storage in the non-volatile memory of
both the first and second cache have not been
completed, the method comprising:
re-synchronising the first and second cache
by:
reading from the list stored in the additional
non-volatile memory; and
for each transaction in the list, transferring
data from the non-volatile memory of one of the
first and second cache to the non-volatile memory
of the other of the first and second cache, where a
record in the list is created prior to the storage of
either the first copy of data or the second copy of
data in the first cache and in the second cache,
respectively.
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