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

File system corruption and USBC folder and files..

This is a quick write up after some initial research into occurrence of sectors that start with the string USBC or 0x55534243. These are common cause for data loss and can be hard to recover from. I think I see why data recovery software is often unsuccessful as these sectors appear to be ‘inserted’ causing… Read More »

USB Stick kapot – Gegevens redden

Ze zijn zo handig maar ook zo kwetsbaar, USB sticks. Om gegevens uit wisselen, de delen, op te sturen. Om je gegevens altijd bij je te hebben ongeacht op welke PC je werkt. Maar zoals gezegd ook kwetsbaar! Kwetsbaarheid USB Sticks USB Sticks zijn kwetsbaar juist als je ze veel gebruikt (maar het tegenovergestelde is… Read More »

Can data be recovered from an erased or zero filled drive?

Overwriting Hard Drive Data: The Great Wiping Controversy Okay, this is another one that annoys me: The claim, the myth that certain three letter agencies can recover data from erased or zero filled hard drives. The claim that those can magically ‘read’ and reconstruct data from ‘latent magnetic residue’ (I am not making this up,… Read More »

Corrupted Micro SD Card freezes computer

If inserting a corrupted Micro SD Card, that you need to recover data from, freezes your computer, then this kind of puts you into a catch 22 situation. For recovery software to work the card needs to be detected and ID correctly. As long as it doesn’t you will be unable to recover your data.… Read More »

Some thoughts on signature based file recovery

But first, file system based recovery I am A ‘Windows person’ and deal with data recovery on file systems that were for the most part designed by Microsoft. As a consequence I can predict with reasonable certainty the chances of successful data recovery after you formatted your NTFS drive. Because I understand what such a… Read More »

SD geheugen kaart bevriest computer, gegevens redden, data recovery (NL)

Probleem: SD geheugen kaart niet leesbaar (SD card, micro SD card) Symptoom: Computer bevriest wanneer SD kaart in lezer aanwezig is Doel: Data recovery Computer bevriest bij detecteren SD memory kaart Om deze symptomen  te verklaren moeten we bergijpen wat er gebeurt wanneer Windows een opslag apparaat detecteert. Windows zal proberen een aantal meta-data structuren… Read More »

Repair and recovery of digital photos

[automatically translated. Original language Dutch] DiskTuna has extensive experience with generic data recovery but specializes in recovering photos from small flash-based data carriers (SD cards, USB thumb drives, etc.). DiskTuna is also one of the few (worldwide!) That is able to repair corrupt digital photos. You can read all about it on this page. You… Read More »

What makes photo and video recovery challenging?

Photo recovery challenges are often related to small flash based drives Most cases that land on my desk arrive as photo or video repair tasks. As I have stated before, many of those are the result of botched recovery jobs, or corruption is caused by a file system or physical issue with the drive. Also,… Read More »

If photos can be recovered, I will.

In several places on this website I make the bold claim that I may recover your photos even if: File recovery or photo recovery software does not. File or photo recovery software recovers corrupt photos. Other labs can’t or recover corrupt files … Of course this is a claim you should not take my word… Read More »

When DIY data recovery is not a good idea ..

What’s wrong with using (DIY) data recovery software to recover data from an ‘unstable drive’? By unstable drive, I mean a drive that has problems delivering the data due to underlying physical problems. Physical problems that potentially get worse due to stressing the drive. Reduce stress on drive So, first goal is to reduce stress.… Read More »