Method for tracking the devices used to load, read, and write removable storage media
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United States of America Patent
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-
Sep 23, 2003
Grant Date -
N/A
app pub date -
Apr 29, 1999
filing date -
Apr 29, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method of identifying previous drives that have accessed a data storage medium. Preferably, compatible drives have an electronically readable identifier, that includes, for example, a unique manufacturer code, drive model number, and drive serial number. Alternatively, a drive identification may be generated by a host computer software device driver. A portion of the medium is dedicated to an Access Audit Table that lists the drive identifiers for the drives that have recently accessed the medium. In addition, a portion of the medium may be dedicated to a Unique Drive Table, which stores the drive identifiers of the most recent distinct drives that have accessed the medium. Any time a writable medium is accessed, the drive must automatically write the drive identifier to the Access Audit Table and, if appropriate, to the Unique Drive Table. Compatible drives must also reject any external commands to write to the Access Audit Table or to the Unique Drive Table. The method enables a possessor of a medium, or a computer operator, to determine for a particular medium, a list of the different drives that have accessed the medium, and the sequential order of drives that have accessed the medium.
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