Category Archives: Disk Structures and File Systems

Disk Structures File Systems are vital for an operating system to locate your data on a hard disk. A chain of pointers, starting at the first sector of your drive eventually points to individual files.

On disk structures

Can corrupt Canon CR2 RAW photos be repaired

Can corrupt Canon CR2 RAW photos be repaired? Unfortunately I know of no software that can successfully repair corrupt Canon CR2 RAW Canon files. Please leave a comment if you do because I’d love to link to it! That being said, depending on your situation there may be options: If the corrupt CR2 file is… Read More »

Photos on SD card are corrupt

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! To create a disk image use the free version of ReclaiMe or Win32 Disk Imager. The image… Read More »

Recover Canon CR2 RAW photos

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 »

Photo recovery: Easeus Data Recovery vs JPEG Recovery LAB

Comparison between various tools for photo recovery The case of the corrupt JPEG files Sometimes it turns out photos can not be repaired after recovery. Best thing to do then is to use better photo recovery software and recover the files again. Files were originally recovered using Easeus Data Recovery. Case: Contacted via Facebook Chat,… Read More »

Videos recovered from a formatted memory card are corrupted after recovery. Can they be uncorrupted?

I frequently come across this question when browsing forums and other PC help sites: Videos which are recovered from a formatted memory card can get corrupted after recovery. Can they be un-corrupted or repaired? Well, that depends on how corrupt the files are and how they became corrupt. There is a more than fair chance… Read More »

Recovering fragmented photos and videos – the file system matters

One of the most frustrating things after file recovery is to discover your files are corrupt. Corruption can be caused by a few different things, IF we assume the software didn’t make errors like guessing the wrong file system. Parts of the file were overwritten after deletion. Overwritten data can not be recovered. File occupied… Read More »

CHKDSK is not available for RAW drives. How to recover your data.

CHKDSK is not available for RAW drives means the file system type of a volume can not be determined. As a result data may be inaccessible. The error indicates file system corruption. I need my files back now! Can you just give me your best recommendation … Yep. I am truly convinced that this is the most user friendly,… Read More »

Data recovery with original file names

When the need arises to recover your data, it is very convenient if data recovery with original file names is possible. Also, if you can restore the entire directory structure, then that’s also a plus. Whether data recovery with original file names is possible largely depends on to two factors: State of the file system… Read More »

The file or directory is corrupted and unreadable – Recover your data

As the error message suggests, “The file or directory is corrupted and unreadable” this is a case of file system corruption. It may happen when you try to access a specific file or folder. It can also happen that you can not access the entire drive (D:\is not accessible – drive letter varies of course). As… Read More »

Why photo recovery and undelete software recover corrupt jpeg files.

In this post I will try to explain why most tools fail recovering fragmented digital photos and instead recover corrupt JPEG files. If half the data is missing due to file fragmentation I can not repair the JPEG (see: JPEG Repair Service). It is better to have a tool that can recover fragmented files directly. Why… Read More »