发明申请
- 专利标题: Continuous backup using a mirror device
- 专利标题(中): 使用镜像设备进行连续备份
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申请号: US11324747申请日: 2006-01-03
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公开(公告)号: US20070156982A1公开(公告)日: 2007-07-05
- 发明人: David Meiri , Magnus Bjornsson
- 申请人: David Meiri , Magnus Bjornsson
- 主分类号: G06F12/16
- IPC分类号: G06F12/16
摘要:
Providing continuous backup of a storage device includes subdividing the storage device into subsections, providing a mirror device of the storage device that contains a copy of data that is on the storage device when the continuous backup is initiated, providing a time indicator that is modified periodically, and, in response to a request to write new data to a particular subsection of the storage device at a particular time, maintaining data being overwritten by the new data according to the particular subsection and according to a value of the indicator at the particular time, where, for a first write after the continuous backup is initiated, data from the mirror device is used to maintain data being overwritten. The subsections may be tracks. Maintaining the data being overwritten may include constructing a linked list of portions of data for each of the subsections. The portions of data may have variable sizes.
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