Wednesday, 20 January 2016 00:00

Dynamic VHD Recovery

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HyperV is Microsoft’s offering for handling the virtual disk environment. As with all new technologies there are times when even the best laid plans of mice and men go awry. This segment offers some answers into the recovery of the most difficult of scenarios, the Dynamic VHD deletion. The following are a few steps that hopefully will allow you to mount your deleted VHD and in doing so bring you and or your client back online.

Building an Image:

For a Fixed VHD this part is easy since for all practical purposes a Fixed VHD is a partition in file form. It has the same attributes and characteristics as a standard partition and maintains the same file system components. There is a bit of metadata and the front of the file but all in all a very basic partition. A dynamic partition however is only as large as the amount of data necessary to maintain the embedded VHD block handler and the actual file system data. In order to recover a dynamic partition I suggest trying to create a VHD file the same size as the maximum size of the VHD if it were full. This value is found in the ‘Size’ column of the VHD Finder under ‘Found VHDs’. Even if the amount of data is less than the total size of the partition the VHD handler will ignore the overall size and just address the actual data.

Mounting the image through software:

There are several good pieces of software that will read a dynamic VHD file and recover the data. There are even pieces of software that will expand the dynamic VHD and make it a Fixed VHD in order to recover the data. Acquire one of those tools and use it to recover the data from the partition.

Reference: http://dtidatarecovery.com/dynamic-vhd-recovery/

Data Recovery Expert

Viktor S., Ph.D. (Electrical/Computer Engineering), was hired by DataRecoup, the international data recovery corporation, in 2012. Promoted to Engineering Senior Manager in 2010 and then to his current position, as C.I.O. of DataRecoup, in 2014. Responsible for the management of critical, high-priority RAID data recovery cases and the application of his expert, comprehensive knowledge in database data retrieval. He is also responsible for planning and implementing SEO/SEM and other internet-based marketing strategies. Currently, Viktor S., Ph.D., is focusing on the further development and expansion of DataRecoup’s major internet marketing campaign for their already successful proprietary software application “Data Recovery for Windows” (an application which he developed).

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