Data processing: generic control systems or specific application – Specific application – apparatus or process – Article handling
Patent
1997-09-16
2000-09-05
Ellis, Christopher P.
Data processing: generic control systems or specific application
Specific application, apparatus or process
Article handling
700214, 700215, G06F 1700
Patent
active
061156485
ABSTRACT:
Non-invasive recalibration is performed for an accessor in a data storage library. The library includes an accessor along with multiple targets such as fiducials, media storage cells, and one or more media drives. A storage unit contains stored coordinates aligning the accessor with the targets. One of the fiducials is predefined as a master fiducial. When recalibrating, the accessor is used to determine new master coordinates currently defining the master fiducial. A positional difference is derived between the new master coordinates and the stored coordinates of the master fiducial. Coordinate update values are determined for each cell and drive according to the positional difference. The coordinate update value of each target may be the derived positional difference, or the target's new coordinate. The coordinate update values are finally stored for use to position the accessor during subsequent operation of the library.
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Butler Michael E.
Ellis Christopher P.
International Business Machines - Corporation
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