Producing a mirrored copy using reference labels
US5787485A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1996 |
| Grant date | Jul 28, 1998 |
| Priority date | — |
| Expiry date | Sep 17, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2071
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A mirror set copy from a first storage device to a second storage device is performed in a computer system in which write requests are each associated with a reference label. Write requests and a mirror read request are received at the first storage device, and the write requests also are received at the second storage device. The write requests are processed at the first storage device processes. Data is read from the first storage device in response to the mirror read request. The first storage device then sends the data to the second storage device along with a reference label of a write request received at the first storage device prior to sending the data. Thereafter, the second storage device writes the data. Finally, the second storage device processes write requests until the second storage device encounters a write request having the same reference label as that sent with the data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.