Patent ID: 7043507
Filing Date: 2006-05-09
Classification: G06F,Y10S

Abstract:
1. A system for backing up data, comprising: a first computing device and a second computing device; a first storage medium and a second storage medium; wherein the first computing device is configured to: initiate a backup operation of a set of data; send a logical representation of a frozen image of the set of data to the second computing device, wherein the logical representation includes a first mapping of a portion of the frozen image to a first region of the first storage medium; and wherein the second computing device is configured to complete the backup operation using the frozen image, wherein said completing includes: receiving the logical representation; prior to backing up data of the portion of the frozen image, determining whether the first mapping of the portion of the frozen image remains valid using a validity identification; in response to determining that the first mapping is no longer valid, obtaining an updated mapping of the portion of the frozen image; accessing data of the portion of the frozen image from the first storage medium using the updated mapping; and backing up the data of the portion of the frozen image to the second storage medium; and in response to determining that the first mapping remains valid, accessing data of the portion of the frozen image from the first storage medium using the first mapping; and backing up the data of the portion of the frozen image to the second storage medium.