Prioritized access for media with heterogeneous access rates
US9003101B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2011 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Dec 11, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2211/5641
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A non-volatile storage subsystem is described which identifies performance-sensitive commands and heterogeneous performance characteristics of portions of a non-volatile storage media, and matches the performance sensitivity of the commands with an available physical write address corresponding to performance characteristics appropriate for the performance sensitivity of the command. A command can be considered performance sensitive if it originates from a host or a preferred host among a plurality of hosts, or if the command designates a frequently accessed logical address. Performance characteristics of the storage device can be determined by physical architectures of the storage media such as the distance from the axial center of a disk media, or the architecture technology of a solid-state array. Performance characteristics can also be determined dynamically and heterogeneous performance can be encouraged by internal maintenance policies of the subsystem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.