| 摘要 |
An invention is disclosed for recovering data in computer environment. Initially a record of historic states of a disk is created, wherein the disk includes various disk locations, such as a disk location X, a disk location Y, and a disk location Z. In response to a request to overwrite original data at the disk location X with new data, the new data is stored at the disk location Y. Then, an indication is established in the record of historic states that indicates the roles of disk location X and Y. These roles could establish the role of disk location X as including historic data, and the role of location Y as including new data for location X. In addition, the method includes intercepting a command to Ski release data at the disk location Z, and establishing an indication in the record of historic states indicating the disk location Z stores historic data.
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