Host fail-over switch presence detection compatible with existing protocol and host controllers
US7515528B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2004 |
| Grant date | Apr 7, 2009 |
| Priority date | — |
| Expiry date | May 30, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2213/0032
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for detecting a presence of a fail over switch is described. In one embodiment, during an Serial ATA sequence initialization handshake, a host transmits a COMRESET to a device. In return, the host receives a COMWAKE from the device. If the host is of a first type of host, then the host identifies a presence of a fail over switch, in response to receipt of the COMWAKE. If the host is of a second type of host, then the host ignores the COMWAKE. The host then receives a COMINIT from the device, in accordance with the Serial ATA sequence handshake. The host transmits a COMWAKE to the device, and the host receives a COMWAKE in return from the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.