Dual storage adapters utilizing clustered adapters supporting fast write caches
US6728818B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2001 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Oct 17, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2007
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An Input/Output (I/O) adapter for use with a second I/O adapter in a clustered configuration. The I/O adapter includes a dedicated communication link, such as a high-speed serial bus, that provides for communication between the I/O adapter and the second I/O adapter. The I/O adapter also includes a message passing circuit, coupled to the dedicated communication link, that allows for transferring of data between the I/O adapter and the second I/O adapter. The I/O adapter further includes a doorbell circuit, coupled to the message passing circuit, that generates interrupts to provide a low level communication between the I/O adapter and the second I/O adapter. A mirroring directory, coupled to the message passing circuit, is also included in the I/O adapter to provide for the mirroring of cache directory writes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.