Continued execution of accessor commands on a restricted...

Details Continued execution of accessor commands on a restricted... Continued execution of accessor commands on a restricted...

2005-11-22

2005-11-22

Crawford, Gene O. (Department: 3651)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Article handling

C700S213000, C700S255000

Reexamination Certificate

active

06968257

ABSTRACT:
In an automated data storage library having a plurality of accessors which access portable data storage media with respect to storage shelves and data storage drive(s) along a path, a controller, in response to detection of restricted movement of an accessor at a position along the path, determines a range of motion of another accessor along the path which avoids interfering with the accessor having the restricted movement. The controller also determines a limit to commands of a work queue of commands for operating the accessors, the limit extending from and past the position of the accessor having the restricted movement, along the path; and prevents execution of the limited commands. The limited commands may be failed with a “hardware” error.

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