Disc control device having reduced seek time by scheduling disc read requests
US5828902A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1995 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Jun 9, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/105
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A disc control device for holding a plurality of read requests as a queue, arranging the read requests and a newly inputted read request, reading out the read requests from the queue in the arranged order, and controlling the output of the requested data from a disc, comprises a queue unit for temporarily holds the read requests as the queue in which the read requests can be arranged, the read requests requesting data readout from the disc; an allowable time hold unit holds allowable time, which shows how much more delay can be allowed in order to satisfy delay time until the end of the data output, of each read request in the queue, the delay time being decided based on the ranking in the read request in the queue; and an arrangement control unit arranges the read requests in the queue along with the newly inputted read request in the queue based on the allowable time of each read request in the queue, each time a new read request is inputted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.