Appeal No. 95-1308
Application 07/999,502
subsystem" (column 3, lines 67 to column 4, line 1); (3) a "subsystem memory 29 stores data
representing the subsystem physical configuration, a subsystem usage log, an exception event log,
fault criteria, problem procedures, and a Problem Profile (record) data base" (column 4, lines 17-21);
and (4) "service alert function 27 is a programmed facility that interfaces with I/O devices in the
subsystem to receive detailed input data from the subsystem" (column 4, lines 28-30).
Although Coale does not describe the DAS, since the DAS is a computer disk file subsystem
for data storage (column 1, line 14) and since such disk files conventionally comprise a "rotatable data
storage medium" and a "transducer means positionable with respect to the rotatable data storage
medium," as recited in claim 1, we find that Coale suggests a rotatable data storage and transducer
means. Appellants do not contest that Coale discloses these limitations. The error detection and
recovery mechanism 25 in Coale necessarily implies the existence of a "processing means . . .
generating indication of error in the data." Coale discloses "analyzing data relating to exception event
reports, or error reports, that may be received from various parts of the storage subsystem, such as
the device, the channel, or the path from the channel to the device" (column 6, lines 13-17) and
combining a new exception event report with a time stamp for recording in the current exception
event portion of the exceptions log in the Subsystem Environment database (column 6, lines 22-26)
which implies the existence of a "device controller having access to a clock . . . and receiving
indications of error from the processing means for generating a plurality of types of operating
records."
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