Error detection/correction and fault detection/recovery – Pulse or data error handling – Error count or rate
Reexamination Certificate
2005-08-16
2005-08-16
Lamarre, Guy J. (Department: 2133)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Error count or rate
C714S042000
Reexamination Certificate
active
06931578
ABSTRACT:
A method and system for determining degradation of a tape drive and tape includes generating a count signal indicative of the number of data blocks read from tape having more than a predetermined threshold of data bytes in error. A degradation signal indicative of tape drive and tape degradation is generated if the ratio of corrected blocks versus the total number of blocks read from the tape is above a predetermined ratio. The degradation signal is indicative of tape drive degradation if the ratio of blocks having more than a predetermined number of error data bytes along a single track versus total number of blocks is above a predetermined ratio, and is indicative of tape degradation if the ratio of blocks having more than a predetermined number of tracks for a given data byte being in error versus total number of blocks read is above a predetermined ratio.
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Brooks & Kushman P.C.
Kerveros James C
Lamarre Guy J.
Storage Technology Corporation
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