How to talk to the service center?

Question

Computer networks

There is a disk with ext3, at a certain moment the disk got screwed up, started giving out i / o error when accessing it, but reads some data.
As a result, the question is: how now to put the algorithm of interaction with the service center, which says that they took the image without errors, but they cannot find the data there? What do you need to make sure in the first place to be sure that they at least shot the image without errors?

Answer 1

It seems to me that here you have a direct road not to the SC, but to an office that can save data from any media.

Answer 2

What do you need to make sure in the first place to be sure that they at least shot the image without errors?

Weird question. In the coincidence of the previously taken image with what was given from the SC.
But seriously, there are two points: practical and legal.
In legal terms, I'm afraid you can hardly prove that the data were there without evidence of their presence. Is it possible to click on violations of the work of the SC itself (this will only work if they are lazy, but not if the data is really kirdyk).
Practical moment: take an interest in what means they used and in what sequence. Further, the easiest option is to remove the image and contact a data recovery office. Or with your own hands - for starters, you need to determine what has come up in the disk. Data from pancakes is saved with the help of software, and the controller, for example, used to be well rearranged from another dead man of the same model.