Method and apparatus for maintaining states of an operator panel and convenience input/output station of a dual library manager/dual accessor controller system in the event of a failure to one controller
US6061309A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1997 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Dec 17, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is disclosed for maintaining states of an operator interface, such as an operator panel and convenience input/output station, of a dual library manager/dual controller system in the event of a failure to one controller during an operation. The invention allows control of the operator panel and convenience input/output station status lights and the states themselves by more than one controller without reinitializing at a default condition by detecting a failure during an operation, switching control to a second accessor controller and establishing a correct state for the operator interface via the second accessor controller. A correct state for a station is established by first establishing a fake empty status for the station and then locking the station, if necessary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.