Unfortunately it is a common problem that you are unable to open recovered photos after using file recovery, undelete or photo recovery software on a SD card. In this post I will make some assumptions: Photos are on a memory card and therefor: File system is a variation of FAT (FAT32, exFAT) File type is… Read More »
In this post I’ll give you some tips on evaluating file recovery software. To tell good from bad data recovery software. If you have just lost data and are now searching for a solution you will find that are hundreds of tools available that all claim to be the best in getting your data back.… Read More »
With Network Attached Storage or NAS for short becoming more popular, the demand for quality DIY solutions for NAS data recovery software increases. I will introduce two of those, and will expand the article in the future with other solutions I come across. Common steps to recover data from a NAS Steps: Disassemble the NAS and… Read More »
The error ‘The volume does not contain a recognized file system’ CHKDSK error message, is what I’d call a ‘catch-all’ error message. It is very generic and it can have multiple causes, but in essence Windows and chkdsk have trouble determining the file system on a volume whether this is on a hard disk or… Read More »
Recovered photos are corrupt and won’t open after you tried to recover them using undelete, file recovery of photo recovery software? Here’s a few things to try. There are a huge number of JPEG recovery and undelete programs available on the web, many even for free. However, the vast majority of these can only handle… Read More »
There’s basically three things that can be wrong if a JPEG opens but is partially grey:
1. File is too small. Let’s an average JPEG shot with same camera and settings is 4 MB and the ones that are damaged are like 1 MB or 2 MB. Then probably half the data is simply missing. These files can not be repaired.
2. Normal file size. Either part of the file does not contain image data or file does contain image data but is interrupted by some invalid data.
If part of the file does not contain image data then this is sometimes easy to spot using a hex editor. All of a sudden ‘random’ binary data stops and changes to FF FF FF or 00 00 00 etc.. Repair: Impossible.
In case the data is however is there but it is interrupted repair is often possible. JPG-Repair tries to detect and will try to get rid of the invalid data, however this does not always work. Current version detects invalid JPEG markers, common damage due to bad sectors and some type of corruption I observed a few times with images shot with certain Samsung phones.
Can corrupt Canon CR2 RAW photos be repaired? Edit 2nd of March, 2019: After having successfully repaired a number of corrupted CR2 (Canon RAW files), I now accept CR2 files for my photo repair service. Unfortunately I know of no software that can successfully repair corrupt Canon CR2 RAW Canon files. This known incapable software… Read More »
When you discover photos on your SD card are corrupt you should: Do as little as possible (read: nothing) with the card. Do NOT run chkdsk on the card itself! Create a disk image of the card immediately! There are free and payed ways to try to recover or repair your photos. So I’ll be… Read More »
Recover Canon CR2 RAW photos. Canon CR2 raw files contain unprocessed raw sensor data. Depending on the camera’s resolution they tend to be quite large and due to typical usage patterns (preview photo > dismiss/delete file > shoot new file etc.) the files become easily fragmented. Shoot video too? Then fragmentation is very likely to… Read More »