06624958 is referenced by 29 patents and cites 5 patents.

A method for identifying faults contributing to a data transfer error in a tape drive. The method includes calculating and comparing a long-term error rate and a short-term error sample. Based upon such calculation and comparison, a pre-selected error recovery procedure may be initialized. The long-term error rate equals a total number of bytes of data transfer error divided by a total number of bytes processed. A short-term error sample includes a number of bytes of data transfer error in a predetermined number of sequential blocks of data divided by the total number of bytes transferred in the predetermined number of sequential blocks of data. The method calculates and monitors a predetermined number of short-term error samples for a predetermined number of sequential blocks of data defining a window. Under normal operational conditions where head/media interface is free of debris, short-term error samples would have values slightly and randomly larger or smaller than long-term error rate. As debris accumulates gradually at head/media interface, the value of succeeding short-term error samples will be larger than the long-term error rate.

Title
Debris detection and error recovery method for tape drives
Application Number
9/605158
Publication Number
6624958 (B1)
Application Date
June 27, 2000
Publication Date
September 23, 2003
Inventor
Mauricio Huerta Alva
Boise
ID, US
Assignee
Hewlett Packard Development Company
TX, US
IPC
G11B 5/09
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