Patent ID: 7379264
Filing Date: 2008-05-27
Classification: G11B

Abstract:
1. A system for accessing a cell, comprising an accessor means for removing and inserting a tape cartridge from a target cell; a picker mechanism associated with the accessor means for taking possession of and releasing a tape cartridge; a plurality of cells for storing tape cartridges, the cells being arrayed in a matrix; a memory for storing stop positions of the accessor means and the picker mechanism corresponding to each cell including an initial stop position of the accessor means and the picker mechanism, wherein the stop position of the accessor means is designated by an X coordinate and the stop position of the picker mechanism is designated by an Y coordinate; a drive mechanism for driving the accessor means and the picker mechanism to the stop positions corresponding to each cell according to the X coordinate and the Y coordinate stored in the memory, and for drawing the picker mechanism through the removal of a tape cartridge from a cell and the insertion of a tape cartridge from a cell; a detection means for detecting whether the accessor means has successfully removed or inserted the tape cartridge to or from the cell based on the alignment between the accessor means or the picker mechanism and the corresponding cell; and a microcontroller means for compensating the misalignment between the accessor means or the picker mechanism and the corresponding cell when the tape cartridge is not successfully removed or inserted relative to the cell, by updating the stop positions by way of incrementally adjusting at lease one of the X coordinate and the Y coordinate, instructing the drive mechanism to drive the accessor means and the picker mechanism at the updated stop positions to retry the removal and insertion of the tape cartridge relative to the cell, wherein the microcontroller means rewrites the X coordinate and the Y coordinate of the updated stop positions into the memory upon the successful completion of the removal or insertion of the tape cartridge relative to the cell.