Storage management system and auto-RAID transaction manager for coherent memory map across hot plug interface
US6397293B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2001 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Jan 19, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A Redundant Array of Independent Disks (RAID) data storage system includes an AutoRAID memory transaction manager for a disk array controller that enables a consistent, coherent memory image of the data storage space to all processors across hot-plug interfaces. To external processes seeking to read or write data, the memory image looks the same across the hot-plug interface. The disk array controller has two identical controllers, each with its own non-volatile memory, to maintain redundant images of disk array storage space. A hot-plug interface interconnects the two controllers. Each controller has an AutoRAID memory transaction manager that enables sharing of cyclic redundancy check (CRC)-protected memory transactions over the hot-plug interface between the two controllers. The AutoRAID memory transaction managers also facilitate ordered execution of the memory transactions regardless of which controller originated the transactions. Mirrored read and write transactions are handled atomically across the hot-plug interface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.