Detecting modifications to a storage that occur in an alternate operating environment

摘要

Detecting modifications to a storage that occur in an alternate operating environment. In one example embodiment, a method for detecting modifications to a storage that occur in an alternate operating environment may include tracking, in a modify map, modifications to a storage that occur during operation of a primary operating environment, identifying a first most recent transaction identifier in a journal of a file system of the storage prior to closing of the storage by the primary operating environment, upon opening of the storage by the primary operating environment, identifying a second most recent transaction identifier in the journal, determining that the second most recent transaction identifier does not match the first most recent transaction identifier, concluding that the storage was modified in an alternate operating environment between the closing and the opening of the storage by the primary operating environment, and invalidating the modify map.

主权项

1. A method for detecting modifications to a source storage that occur in an alternate operating environment, the method comprising:
tracking, in a modify map, modifications to a source storage that occur during operation of a primary operating environment; identifying a first most recent transaction identifier in a journal of a file system of the source storage prior to closing of the source storage by the primary operating environment; upon opening of the source storage by the primary operating environment, identifying a second most recent transaction identifier in the journal; determining that the second most recent transaction identifier does not match the first most recent transaction identifier; and in response to determining that the second most recent transaction identifier does not match the first most recent transaction identifier:
concluding that the source storage was modified in an alternate operating environment between the closing and the opening of the source storage by the primary operating environment; andinvalidating the modify map.