Appeal 2007-1352
Application 10/406,127
STATEMENT OF THE CASE
Appellants' invention relates to a fault-tolerant computing system that
uses write data caching. (Specification 1:6-7.) In the words of the
Appellants:
As will be explained in greater detail below, the
primary adapter (150 or 160) creates a non-volatile
record (in non-volatile memory 150C or 160C
respectively) of each cache update before it is
applied to either cache’s non-volatile memory
150B or 160B respectively. Each such record is
cleared when the primary adapter knows that the
cache update has been applied to both adapters'
non-volatile memories.
Consequently, the primary adapter has, at all
times, a non-volatile list (in non-volatile memory
150C or 160C respectively) of all ongoing transfers.
(Specification 6:10-21.)
Claims 1, 7, and 16 are exemplary:
1. A cache memory system for use in a data
storage system, the system comprising:
a first cache comprising non-volatile
memory for storing a first copy of data; and
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, the additional non-volatile memory being
arranged to hold a list of ongoing cache data
2
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