Automated storage library having inventory at picker level

Details Automated storage library having inventory at picker level Automated storage library having inventory at picker level

1994-06-10

1994-12-27

Envall, Jr., Roy N.

Boots, shoes, and leggings

369 34, 369 36, 369 39, G11B 1500

Patent

active

053771214

ABSTRACT:
An optical disk having its disk inventory at the picker level is disclosed. The library includes two library controllers and four pickers. Each library controller maintains a list of the storage media in the entire library, but has no disk location inventory. The library controllers are not coupled to each other. Each picker has exclusive access to a set of storage cells and internal peripheral storage devices. In addition, the picker controller for each picker maintains the disk location inventory for the disks accessible by such picker. During a failure condition which prevents one library controller from accessing a particular storage medium, the other library controller can be signalled to attempt to access such storage medium. The overhead associated with maintaining two identical copies of the inventory in the library controllers is therefore eliminated.

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