System and method for splitting an image across multiple computer readable media

• US 20050216694A1
• Filed: 05/20/2005
• Published: 09/29/2005
• Est. Priority Date: 06/17/2002
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Cohen, Jason, Jhanwar, Raj, Burkhardt, Ryan
• Granted Patent: US 7,395,453 B2
• Time in Patent Office: Days
• US Class Current: 711/173
• CPC Class Codes: G06F 16/10 File systems; File servers

Abstract

A software tool and method in which a source image is split into and spans across two or more image pieces having a data structure which fits onto a computer readable medium having an available storage capacity which is smaller than the size of the source image. Also, software tool and method which combines two or more image pieces of a source image on a destination medium into a re-combined image having a data structure corresponding to the source image.

Claims

1. A software tool which splits a source image each having a plurality of files into two or more image pieces each having at least two of the plurality of files, each of the image pieces fitting onto a computer readable medium having an available storage capacity which is smaller than the size of the source image, said software tool comprising:

a selecting tool responsive to user input for designating certain of the plurality of files of the source image to be included in a first image piece and for designating remaining files of the plurality of files of the source image to be included in a second image piece wherein the second image piece is independent from the first image piece so that each of the first and second image pieces is configured to be modified, updated, viewed, read or restored independently of the other image piece and without reassembly of the first and second image pieces;

a splitting tool which groups the designated files into their corresponding image piece; and

a chaining tool which labels each of the image pieces.

4. The tool of claim 1 wherein one or more of the image pieces includes a bootable combination of files and wherein the bootable combination of files are a unique portion of one of the image pieces so that the files do not take up duplicate space on the computer readable medium on which the image piece is stored.

6. The tool of claim 1 wherein at least one of the image pieces includes all files required by a particular application so that the one image piece is capable of initiating operation of the particular application without access to any other image pieces.

7. The tool of claim 6 wherein the particular application is a setup engine so that the one image piece is capable of initiating setup.

9. The tool of claim 1 wherein the chaining tool creates a unique header for each of the image pieces and a metadata file for each of the image pieces.

12. The tool of claim 1 wherein each of the image pieces is part of a recovery media and wherein each of the image pieces includes a minimal bootable operating system.

37. The tool of claim 6 wherein the chaining tool creates a unique header for each of the image pieces and a metadata file for each of the image pieces.

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13. A method of splitting a source image into two or more image pieces each having a plurality of files, each of the image pieces fitting onto a computer readable medium having an available storage capacity which is smaller than the size of the source image, said method comprising:

designating which files of the source image to be included in each image piece so that a particular image piece includes all the files which would be required by an application so that the particular image piece is capable of initiating operation of the application on a computer independent of the computer accessing the other image pieces of the source image; and

grouping the designated files into their corresponding image pieces.

14. The method of claim 13 further comprising labeling the image pieces, including:

writing a header for the image piece wherein the header corresponds to the designated files;

writing a metadata for the image piece wherein the metadata corresponds to the designated files;

copying priority data which corresponds to the designated files from the source image to the image piece;

copying non-priority data from the source image to the image piece; and

adding a signature to the image piece which signature corresponds to the contents of the image piece.

38. The tool of claim 13 wherein one or more of the image pieces includes a bootable combination of files and wherein the bootable combination of files are a unique portion of one of the image pieces so that the files do not take up duplicate space on the computer readable medium on which the image piece is stored.

39. The tool of claim 13 wherein the particular application is a setup engine so that the one image piece is capable of initiating setup.

40. The tool of claim 13 wherein the chaining tool creates a unique header for each of the image pieces and a metadata file for each of the image pieces.

41. The tool of claim 13 wherein each of the image pieces is part of a recovery media and wherein each of the image pieces includes a minimal bootable operating system.

42. The tool of claim 41 wherein the chaining tool creates a unique header for each of the image pieces and a metadata file for each of the image pieces.

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35. A computer-readable medium having stored thereon a first image piece of a software image which first image piece can be combined with one or more other image pieces of the software image into a combined image which corresponds to the software image, comprising:

an image of descriptive data of the software image including a unique header for each of the image pieces and a metadata file for each of the image pieces; and

an image of file data of the software image.

43. The tool of claim 35 wherein one or more of the image pieces includes a bootable combination of files and wherein the bootable combination of files are a unique portion of one of the image pieces so that the files do not take up duplicate space on the computer readable medium on which the image piece is stored.

44. The tool of claim 35 wherein at least one of the image pieces includes all files required by a particular application so that the one image piece is capable of initiating operation of the particular application without access to any other image pieces.

45. The tool of claim 44 wherein the particular application is a setup engine so that the one image piece is capable of initiating setup.

46. The tool of claim 35 wherein each of the image pieces is part of a recovery media and wherein each of the image pieces includes a minimal bootable operating system.

47. The medium of claim 35 comprising a selecting tool responsive to user input for designating certain files of the source image to be included in a first image piece and for designating the remaining files of the source image to be included in a second image piece wherein the second image piece is independent from the first image piece so that each of the first and second image pieces is configured to be modified, updated, viewed, read or restored independently of the other image piece and without reassembly of the first and second image pieces.

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