virtualbox.org

Hi guys

I hope someone with some in depth understanding of the .vdi file format can help me?

I have just experienced the horrible experience of a HDD failure, and one of the files damaged is my precious .vdi file containing my ubuntu vm. Now I know that the file is 100% intact EXCEPT for the first 4096 bytes that were lost. They are presently zero'd out.

Please can someone help / guide me as to what the first bytes should be, and what critical information I need to "put back" in order to recover the data within the .vdi ?

Some details on the .vdi file:
Total file size: 78 Gb
Lost data: Bytes 1-4095

Thanks in advance for any help!

Post precise details: I would need file size to the exact byte, not rounded to GB. I may also later ask you to provide a dump of the next few K of the file (containing the block map), once I know what size it needs to be.

What version of VBox created this VDI?