Patent · US Active

Method and apparatus for separating snapshot preserved and write data

US7975115B2 · kind B2 · utility

186Cited by

28References

18Claims

0Family size

Assignee

Dot Hill Systems Corporation

Inventors

James G. Wayda · Laguna Niguel, US
Kent Lee · Shoreview, US
Ngoclan Thi Vu · Irvine, US
Elizabeth G. Rodriguez · Carlsbad, US

Key dates

Filing date	Jul 19, 2007
Grant date	Jul 5, 2011
Priority date	—
Expiry date	Nov 30, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG06F2201/84
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A method and device for managing snapshot data is provided. Snapshots may be created having a preserved data area and a write data area. The preserved data area is used to maintain snapshot data corresponding to the point-in-time when the snapshot was created while the write data area is used to facilitate host read/write access to the snapshot. By maintaining two separate areas, the snapshot can be written to without altering the point-in-time representation of the snapshot.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.