Managing shared devices in a data processing system
US6484217B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1999 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Apr 20, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0674
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a method and device adapter for managing devices in a data processing system that includes a plurality of device adapters connected for independent communication with at least one shared device (e.g. disk data storage device). The method comprises the steps of: issuing a command from a first of the plurality of adapters to the at least one shared device; setting, in the first adapter, first and second timeouts associated with the command; on expiration of the first timeout value, issuing a message from said first adapter to other(s) of the plurality of adapters to request the other adapter(s) to notify the first adapter of any work requested of the shared device by the other adapter(s); and on expiration of the second timeout value, initiating a recovery operation in the data processing system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.