step analyzing data recovery

[beto]

hello friends and all hddguru´s

i want to post a new forget step on data recovery field the " analyzing of the recovered data" i think one of the most, harded, tasks, i had spoke with some friends on another countries, and they told me after they did the data recovery they dont check the files, one by one only somes or a group of files and send to the customer, well here on mexico the customer its different if u send to the customer some files, wich he cant open it, u can get in problems and with a angry customer , imagine when its a hard disk with 500Gb of data so i had try to search programs like preview´s etc, but this dont help because there are some file of type , wich u can preview, but some times cant opent even u can see the previe it, for example :JPEG,CDR, PPT, so im thinking on get a program solution maybe by my self, but my question its, where to start jaja, in another words.

u get a file, the file have a header offset and code etc, i was thinking on a easy program wich check the checksum of the file´s, if the checksum its bad, the files could be bad, but this is not happend always and would not be safe what do u think about!! or another solution to check many files recovered?
best Regards

Sinceraly

Alberto

[TerraNova]

Hi beto, i think you need create MD5 or similar before you can check the file integrity, otherwise nothing to compare with....oh..unless a program to check just the header and EOF....thinking.... ...good to have such program though...great thought beto.

[dobrevjetser]

Hi Alberto,

I wrote such a program to check word and excel files (had a job where i had several thousand word and excel documents, most of them corrupt). I used it to check the signatures in order to eliminate the completely corrupt files).
It is quite rudimentary however, although it should be possible to add other signatures too.
But how do you check if the contents is ok?
Imagine a file consisting of three sectors. First sector contains signature and is ok; last sector contains EOF and is ok; middle sector is corrupt.
How can we test? It would be nice if microsoft included a checksum, but to my knowledge, this is not the case.


Dobre

[sempre]

Hi Alberto!

This subject is well delicate, I in particular use the experience to deduce and to open some archives that the customer considers thus more important...
I have obtained to please them!
For the time being

[pepe]

Hi
I usually make an estimation about the success rate at the time the quotation is given. I tell the customer like 90% of the files are expected as good.
Moreover I always request them to give as specific list of files/folders with the highest priority.
Usually this is not that large amount and I can check and notify the customer about the quality of the files.
BTW in my oppinion the customer doesn't pay for the data, he pays for the recovery work he ordered. So I have to be as precise with the evaluation and estimation as possible to avoid inconvenient arguments about data integrity.
Sometimes it is not possible to restore totally intact files due to surface damages or writing problems, the amount of work is similar or even higher with these cases and I am not the source of the errors. I do my best, I recover what is still recoverable. He pays for this work and not for the data, sometimes it is hard to understand.

pepe

[rameez]

yes i agree with your point pepe

"The customer doesn't pay for the data, he pays for the recovery work he ordered"

but sometimes there are customers who donot appreciate the work we do for them even if they get 80% of the data .

[pepe]

Hi,

in this case it all depends what estimation U gave. If U told him 98% and he ordered the work that way, then 80% can be a problem. If U told him 50-90, he should be satisfied with the 80...
and pay gladly

pepe