Recuva defective for photo files recovery
Posted 31 August 2012 - 04:17 AM
I ran a test on a SD card that was formatted and new files stored on it.
Recuva recovers some files only, even with a deep scan activated
In comparison, Stellar Phoenix Photo Recovery is excellent and recovered 100's
Why such a difference regarding photos?
What is so special about this type of files?
Posted 02 September 2012 - 08:29 AM
Thank you for posting your results. Anyone else have a similar experience?
Posted 02 September 2012 - 10:42 AM
I agree. The only reason the above is mentioned, is it is impossible to test the effectiveness of one, without having another to compare it with.
I haven't had time to test the program listed above, so I intend to run side by side tests of both programs on a flash drive with deleted files/photos to test which is the more effective. NOT to diss Recuva, but as a method & means of comparing recovery results, & to test the effectiveness of each.
If the above listed program is found more capable, this would mean that something about the algorithm or recovery methodology is in need of alteration.
While I do agree that this is about Recuva, the question I have is, how would one be able to find ways to improve it without comparison to others?
Posted 02 September 2012 - 11:27 AM
That's fine. If that's indeed, what you want. Observations & software testing will have to be privily made, I suppose, in order that improvements be made?
Posted 02 September 2012 - 02:09 PM
That said it is definitely a fact that specialized photo recovery will be better at photo recovery because they can be programmed with more heuristics to identify the garbled code that is a deleted file; it is also able to insert the logical code snippets in the case of missing ones
Real world analogy: It is easier to a fluent Russian speaker to reconstruct shredded KGB files than it is for me, a non-Russian speaker/reader, to do the same task.
DON'T JUST CLEAN EVERYTHING THAT'S CHECKED OFF.
Do your Registry Cleaning in small bits (at the very least Check-mark by Check-mark)
ALWAYS BACKUP THE ENTRY, YOU NEVER KNOW WHAT YOU'LL BREAK IF YOU DON'T.
CCLEANER, RECUVA, DEFRAGGLER AND SPECCY DOCUMENTATION CAN BE FOUND AT www.piriform.com/docs
Link to Winapp2.ini explanation
Posted 02 September 2012 - 05:23 PM
Posted 02 September 2012 - 06:08 PM
That's a good point. If Recuva was to write proper file headers/code, etc., then people would have something entirely different to complain about since Recuva would have to go commercial/shareware because it would cost Piriform to license the ability to for instance write valid JPEG, GIF, etc., headers into files - which is often the sole reason why commercial photo recovery software is often expensive.
Posted 02 September 2012 - 06:46 PM
Posted 03 September 2012 - 05:23 PM
It's probably a little more tricky anyways getting them off of flash-based media like USB Thumb Drives.
Posted 03 September 2012 - 05:53 PM
The problems for a recovery seem to be the variety of raw image types ...
Understanding Raw Files:
The original poster doesn't mention the make of camera, which may be significant to his issue.
Recuva can scan for Cannon Raw format image files (.CRW format), but they are the only ones mentioned in the Recuva guide.
How To Get Into Safe Mode | Returnil 2008 | Sandboxie | ERUNT GUI | TestDisk | MiniTool Partition Wizard - Home Edition
Posted 03 September 2012 - 07:21 PM
I'd just be happy if they can include "RAW" HDD recovery...
1) Install XP (No Service Packs)
2) Copy files to an external drive until it is well beyond the 137 GB limit.
3) Try browsing, and/or viewing files as well as using Safe Eject & then reconnecting.
The drive should appear as "RAW" at some point. Trouble is, this may be a fake RAW as installing a SP will probably enable it to see the content.
When HDD truly go RAW, I usually have to use 3rd party to scan for & recover "lost" partitions...
I am always hoping that Recuva will one day include this... Scan for lost partitions. I check every several versions for it. It is the one thing I have trouble with most, because I work with lots of HDD drives. And you can't recover files if Recuva don't see them.
I think Recuva is very good, & I wish it had this so I can just "break the chains" as it were, and go 100% Recuva...
Posted 04 September 2012 - 03:58 AM
I think that Recuva is very much a hard drive application. I've just plugged my old and much used camera in to the pc (don't have an integrated card reader) and Recuva shows no files found on both a normal and deep scan. Maybe the card (XD) is very clever at garbage collection, but I doubt it.
I think that a dedicated photo recovery application is expecting to read files in some picture format, and so can make some assumptions if data is missing or corrupt. Recuva is a generalised recovery application and has to cope with what could be any recognised file format, so has to be more circumspect in what assumptions it makes.
Posted 10 September 2012 - 09:39 PM
Recuva is my general go-to application for undeletes and recovery of files in general when not much damage has happened to the disk structure and file system. I have no problem and I don't get all huffy when Recuva (or any other program) doesn't seem to work right. You analyze the situation, learn about what happened and what is happening, and then try another program more suited for the task at hand.
This little article will touch on some of the difficulties involved with recovering pictures.