Concurrent maintenance for PCI based DASD subsystem with concurrent maintenance message being communicated between SPCN (system power control network) and I/O adapter using PCI bridge
US6199130A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1998 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Jun 4, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2089
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In an electrical system, concurrent maintenance of a system component coupled to the system by an adapter on a first communications path is accomplished through the provision of a second communications path to a system power controller, so that concurrent maintenance is not dependent on communications over the first communications path. In particular, concurrent maintenance of a direct access storage device (DASD) coupled to a computer system through a small computer system interconnect (SCSI) bus, an input-output adapter (IOA), a peripheral component interconnect (PCI) bus and a PCI bridge circuit (PCIB), is enabled by providing a IIC serial, point-to-point signal path between the bridge circuit and a system power control network (SPCN) to coordinate quiescing of the SCSI buses and powering down of the DASD.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.