System and method for converting a physical disk to a virtual disk
A method for converting a disk of a physical computer into a virtual disk for use by a virtual machine is described. Contents of the disk of the physical computer are copied into an image file, wherein the image file has a different sector-by-sector organization of the contents than the disk but a logically equivalent file system organization. Hardware configuration information from the image file is then extracted, wherein the hardware configuration information relates to hardware of the physical computer and, based on a comparison of the extracted hardware configuration information and a virtual hardware configuration of the virtual machine, hardware-dependent files in the image file are replaced with substitute files that are compatible with the virtual hardware configuration of the virtual machine.
1. A method for converting a disk of a physical computer into a virtual disk for use by a virtual machine comprising:
copying contents of the disk of the physical computer into an image file, wherein the image file has a different sector-by-sector organization of the contents than the disk of the physical computer but has a logically equivalent file system organization of the disk of the physical computer;
extracting hardware configuration information from the image file, wherein the hardware configuration information relates to hardware of the physical computer; and
replacing, based on a comparison of the extracted hardware configuration information and a virtual hardware configuration of the virtual machine, hardware-dependent file in the image file with substitute files that are compatible with the virtual hardware configuration of the virtual machine.
2. The method of claim 1 , further comprising modifying a configuration file corresponding to the virtual machine to be compatible with at least a portion of the hardware configuration information of the physical computer, wherein the configuration file defines a virtual hardware profile of the virtual machine and is separate from the image file.
3. The method of claim 2 , wherein modifying the configuration file includes reconfiguring network bindings of the virtual machine to be consistent with network bindings of the physical computer.
4. The method of claim 1 , wherein the extracted hardware configuration information includes an indication of a patch-level of an operating system stored in the disk of the physical computer.
5. The method of claim 1 , wherein the substitute files are stored in a copy-on-write file that is combined with the image file to represent the virtual disk.
6. The method of claim 1 , wherein the method is performed without utilizing a running virtual machine to mount the image file in order to replace the hardware dependent files.
7. The method of claim 1 , wherein the extracting step is performed without requiring an application running on the physical computer to query the physical computer.
8. A non-transitory computer-readable storage medium storing instructions that, when executed on a computer processor, causes the computer processor to convert a disk of a physical computer into a virtual disk for use by a virtual machine by performing the steps of:
copying contents of the disk of the physical computer into an image file, wherein the image file has a different sector-by-sector organization of the contents than the disk of the physical computer but a logically equivalent file system organization of the disk of the physical computer;
extracting hardware configuration information from the image file, wherein the hardware configuration information relates to hardware of the physical computer; and
replacing, based on a comparison of the extracted hardware configuration information and a virtual hardware configuration of the virtual machine, hardware-dependent files in the image file with substitute files that are compatible with the virtual hardware configuration of the virtual machine.
9. The non-transitory computer-readable storage medium of claim 8 , further storing instructions that, when executed on the computer processor, causes the computer processor to perform the step of modifying a configuration file corresponding to the virtual machine to be compatible with at least a portion of the hardware configuration information of the physical computer, wherein the configuration file defines a virtual hardware profile of the virtual machine and is separate from the image file.
10. The non-transitory computer-readable storage medium of claim 9 , wherein modifying the configuration file includes reconfiguring network bindings of the virtual machine to be consistent with network bindings of the physical computer.
11. The non-transitory computer-readable storage medium of claim 8 , wherein the extracted hardware configuration information an indication of a patch-level of an operating system stored in the disk of the physical computer.
12. The non-transitory computer-readable storage medium of claim 8 , wherein the substitute files are stored in a copy-on-write file that is combined with the image file to represent the virtual disk.
13. The non-transitory computer-readable storage medium of claim 8 , wherein the steps are performed without utilizing a running virtual machine to mount the image file in order to replace the hardware-dependent files.
14. The non-transitory computer-readable storage medium of claim 8 , wherein the extracting step is performed without requiring an application running on the physical computer to query the physical computer.
15. A computer system for converting a disk of a physical computer into a virtual disk for use by a virtual machine, wherein the system comprises a processor configured to perform the steps of:
copying contents of the disk of the physical computer into an image file, wherein the image file has a different sector-by-sector organization of the contents than the disk of the physical computer but a logically equivalent file system organization of the disk of the physical computer;
extracting hardware configuration information from the image file, wherein the hardware configuration information relates to hardware of the physical computer; and
replacing, based on a comparison of the extracted hardware configuration information and a virtual hardware configuration of the virtual machine, hardware-dependent files in the image file with substitute files that are compatible with the virtual hardware configuration of the virtual machine.
16. The computer system of claim 15 , wherein the process is further configured to perform the step of modifying a configuration file corresponding to the virtual machine to be compatible with at least a portion of the hardware configuration information of the physical computer, wherein the configuration file defines a virtual hardware profile of the virtual machine and is separate from the image file.
17. The computer system of claim 16 , wherein modifying the configuration file includes reconfiguring network bindings of the virtual machine to be consistent with network bindings of the physical computer.
18. The computer system of claim 15 , wherein the extracted hardware configuration information an indication of a patch-level of an operating system stored in the disk of the physical computer.
19. The computer system of claim 15 , wherein the substitute files are stored in a copy-on-write file that is combined with the image file to represent the virtual disk.
20. The computer system of claim 15 , wherein the processor performs the steps without utilizing a running virtual machine to mount the image file in order to replace the hardware dependent files.