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 »
The other week I received a SD memory card on which chkdsk was automatically run. Chkdsk turned all JPEGs into .CHK files. When Chkdsk removes certain files from the file system, it saves the content of the clusters that belong to the file in .CHK files. They are typically written to a folder called ‘FOUND.000’. As… Read More »
JPEG Repair software from Stellar is the one of the few photo repair tools to fix corrupt or damaged photos, images and picture files, having JPEG file extension. Stellar offers a wide variety of data recovery related software and services. NEW! I now offer an alternative for Stellar: DiskTuna JPEG Repair Software. JPG files can become… Read More »
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 »
Recovering data from a SD card or any other type of memory card is essentially the same as recovering data from a regular disk. As memory cards are typically ejected and inserted on a regular basis they appear to be a tad more prone to file system corruption. If this happens the memory card file… Read More »
This article explains RAW Recovery vs. File System Recovery. File System Recovery is able to preserve the directory tree and recover data with the original file names. Some times however RAW Recovery is the only option. To recover data from a disk, basically two methods are available to data recovery software: They can try to… Read More »
Noticed this week that a new version of Ontrack EasyRecovery is available. As I have looked at this software in the past I decided to check it out. EasyRecovery isn’t EasyRecovery. Ontrack has a history of out sourcing it’s DIY Data Recovery software development. It’s initial software was called Tiramisu which was developed by the German… Read More »
This case study shows the step-by-step process of the repair of a corrupt JPEG file using our in-house developed software, the JPEG Repair Toolkit.
Looking into data loss from SD Cards. In this post I want to look at and discuss some cases that came to me because I offer a JPEG Repair Service.
An often heard complaint after using digital image recovery software, is that it shows intact previews, but recovers corrupt photos. How does this happen? The preview is not the actual image data To understand how this can happen we need to have closer look at the internal structures of popular image formats. The most common image formats… Read More »