7 replies to this topic

[gregmarsh]

I have 3 files all at over 7gig each - I have tried to restore each one of them and even though the program report that a complete restore was done only part of the file is actually restored.


It is a zip file.

[Augeas]

How did you find these files, normal or deep scan?

[Super Fast]

Greg, i believe the zip container will corrupt with anything over 4GB in it. At least it seemed to under XP, I think.

I believe this may still be true under 7 as a result of the zip max file size, but I am not sure...

RAR is a much better format for storing large data sets, because it stores petabytes of data.

[gregmarsh]

I used a deep scan. I use zip for much bigger files than 7gig and the scan knows the right file - what happens is that it only reaches 80+% of the restore and then it stops and reports that it is 100% done.

Unfortunately I can not use RAR now but would it make any difference? Is this not a Recuva issue? I used the zip before.

[Augeas]

Is the size of the recovered file the same as shown in the deep scan, or 80% of it? Or is the size of the file found 80% of what it should be, and Recuva recovers all of that?

Have a read of http://forum.pirifor...wtopic=36779

In that thread the theory was that a normal scan, reading the MFT, would show a file size of zero and the file would not be recoverable. In a deep scan Recuva finds the first extent of the file from the file signature. Recuva can't find subsequent extents as there is no connecting information - it is all held in the MFT. Only part of the file is recoverable.

It all depends on the answers to paragraph 1.

[gregmarsh]

The deep Scan Reports the 7M ... the progress indicator goes to just over 80% then jumps to finished reporting 100% complete versus providing a report that shows partial completion which I normally get. The recovered file varies in size - I have more than one copy of the zip file all showing the same size but the recovery size varies dramatically.

sorry for the delay in reply but for some reason I am not getting notified of the replies.

[Augeas]

I'm going to have to confess my lack of zip knowledge. I have just deleted a 12k zip file, scanned in Recuva and it comes up as 128 bytes. The Info panel shows those 128 bytes only. I recovered it and it was back to 12k. So I don't really know what's happening.

Is there any way of testing a recovered zip file to see it it's actually complete?

PS I just deleted the recovered 12k zip file again, and Recuva shows it as 26 bytes. Recovered as 12k, Zip files are certainly a puzzle.

[gregmarsh]

zip files have the ability to ensure their integrity. That is part of the reason why I am stuck because zip knows the file is not complete and will not proceed.
Also if you want to be sure you can compress with the option to test.