Method for maintaining consistent dual copies of vital product data in a dual accessor library of portable data storage media
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United States of America Patent
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Jul 26, 2005
Grant Date -
Aug 21, 2003
app pub date -
Feb 19, 2002
filing date -
Feb 19, 2002
priority date (Note) -
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Abstract
A dual accessor library is equipped to maintain consistent dual copies of vital product data (VPD) or other such metadata. For each accessor, the library includes various associated components, including a controller to manage the media accessor, VPD or other such metadata containing information representing prescribed types of library properties, and a version code corresponding to the VPD. Each controller advances the associated version code in response to VPD changes. Responsive to predetermined stimuli, the accessor controllers compare their associated version codes and if the version codes do not match, updating the older VPD with contents of the newer VPD.
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