Contention handling for task requests to storage devices within a host system
US6279074A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1998 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Jun 1, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0686
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a system for handling recall requests for data maintained in storage devices from a host system. The host system maintains a queue of recall requests to a plurality of storage devices. Priority data is associated with each recall request in the queue. The host system initiates a recall operation for a recall request in the queue to a first storage device mounted in a drive. The host system then determines whether a next recall request to the first storage device has a higher priority than a recall request to a second storage device not mounted in a drive. The recall operation for the next recall request to the first storage device is performed after determining that the next recall request has the higher priority. The first storage device is demounted from the drive after determining that the recall request to the second storage device has the higher priority. The second storage device to the drive is mounted after demounting the first storage device from the drive. The recall operation for the recall request to the second storage device is then performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.