I've had a disaster with a repartioning operation and the disk is now unreadble.
I used to be a data recovery engineer and I also wrote our data recovery software tools. In my time I've probably performed thousands of recoveries.
I've tried a couple of trial programs which indicate a lot of the data is recoverable but they're a bit pricey for me.
Let me put it like this:If you needed brain surgery would you opt for the cheapest, automated solution you can find or would you prefer to pay extra for an expert to look at it?
More specifically a partitioning incident is exactly the kind of thing that needs common sense and an intuitive approach. A human DR engineer could probably tweak the partitions and get everything back with minimal damage. A software package on the other hand could do anything.
The basic problem with automated tools is that they have to start with an assumption and that assumption is written into them by someone that knows nothing about your computer or the particular fault it has suffered. They usually read the standard structures from the expected places and assume that they just need to be fixed up. We saw the effects of such tools many times. Tools that thought nothing amiss about a partition table pointing half way up a disk while claiming a size that was twice that of the media itself. They just followed the structure and attempted to repair a volume that didn't exist.
What we did was realise the original table was wrong and went and found the volumes ourselves and rebuilt the table. Couldn't do much for the data that got mangled by the recovery utility but most of it survived.
If you really value your data I suggest you send it to a data recovery company. I still work for one although no-longer in that side of the business. To be honest I'm not so keen on their techniques (they took my original employer over and shunted us across without much interest in our tools) but they seem to do a pretty good job.
The company is Kroll Ontrack but to avoid being accused of spam I'll leave it up to you to do the web search
Edited by Andrue (Thu 08-Dec-11 14:42:41)