Cartridge shifting optimization in a super library
US5740061A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1997 |
| Grant date | Apr 14, 1998 |
| Priority date | — |
| Expiry date | May 28, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/41
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system for optimizing the position and use of cartridges of machine-readable data storage media in an automated super library. The invention is implemented in a super library that includes a main library bin with a plurality of cartridge slots, a picker, and multiple small libraries, where each small library has a small library bin with multiple slots, a picker, and at least one data drive. Mount queue times are estimated for each small library, and a main library picker is selectively operated to transfer cartridges between the small libraries based on the estimated mount queue times. This provides expedited access of the cartridges at the small libraries. The host processor maintains requests for such inter-library transfers in a main picker queue, for processing by the main picker. When each small library has a non-empty mount queue, the main picker processes small libraries' cartridge transfer requests by efficiently distributing cartridges along the small libraries. In addition to these demand-based transfer requests, the main picker regularly performs load-leveling between the small libraries and the main library bin, to ensure that the higher demand cartridges are stored i…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.