Method and apparatus for improving sequential writes to RAID-6 devices
US6101615A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 1998 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Apr 8, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2211/1057
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method is provided for reducing the number of transactions for multi-segmented host system write operations in a RAID 6 device. The method comprises sending a write command for new multiple data segments to a plurality of data drives in the RAID 6 device via a RAID 6 controller. The RAID 6 device has data segments stored in stripes on the data drives and parity drives within the RAID 6 device. Parity is calculated for old data segments, new data segments and old parity on the parity drives to determine a new parity. The new parity is then written to one parity drive of the multiple parity drives within the RAID 6 device, thereby reducing the number of read and write transactions between the controller and the drives within the RAID 6 device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.