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

JPEG Recovery using Piriform Recuva

Recently I was offered a batch of corrupt JPEGs for repair that were recovered from a SD card using Piriform’s Recuva. The recovered files were not recognized by any image viewer as valid JPG files. File system scan By default Recuva performs a file system scan to discover deleted files. In most cases this means… Read More »

Professionals use ReclaiMe to recover NAS data

A 5 star review from an IT pro is always good news. The fact that the reviewer compared ReclaiMe Ultimate to competing products  even adds value. Better than the rest, easier than the rest “I have tried with many other Data recovery software such as UFS Explorer, DiskInternals, Captain Nemo, none of them mange to… Read More »

Corrupt JPEG Files

First things first, what is repair and what is recovery? Corrupt JPEG file Repair and JPEG File Recovery are often mixed up. Recovery: Meaning getting lost or deleted files back from for example a memory card. Maybe the card itself (the file system) is corrupt or the card was accidentally formatted. Repair: Repair existing JPEG files that… Read More »

Petya or NotPetya from a data recovery perspective

This is not a blogpost on the inner workings of this ransomeware. I am purely interested in discussing the recover-ability of your data. The Petya or NotPetya ransomware appears to do three things to prevent you access from your data: It encrypts the MBR Individual files files are encrypted Then it encrypts the Master File… Read More »

Asking data recovery advice in community forums, is not without risk.

Online Community Support Forums and data recovery advice I like helping people when it comes to disk and data loss related problems. A few decades ago I was a frequent visitor and contributor of hard disk related Usenet newsgroups, for example “”. And more recently I decided to spent a little time on this hobby… Read More »

Welcome to the Matrix. What data on your hard disk really looks like.

Few may actually wonder how the operating system, Windows for example, keeps track of all your data, your files. How does Windows find things on a disk? What does the data on a disk really look like? For the few taking the red pill, I write this. Let’s discover what’s underneath the world of stylish… Read More »

Undelete, File Recovery or Data Recovery Software. What is the difference?

For many, undelete, file recovery or data recovery software is all kind of the same thing. Even ‘professional’ reviewers use the terms loosely. And more often than not they tend to compare full blown data recovery software under review to other (free) software offering less options. Recuva from Piriform and also PhotoRec from CGsecurity are often used… Read More »

The volume does not contain a recognized file system – How to recover your files

The cause for Windows or Chkdsk failing to recognize the file system on a volume, mostly lies with file system corruption within the volume itself. Theoretically it also possible that an error in the partition tables is the cause for this error. Windows Disk Management will list the file system of the drive as “RAW… Read More »

File Recovery from a SSD

Is file recovery from a SSD (Solid State Drive) possible? As more and more PCs and laptops are shipped with a SSD drive this question becomes more relevant. The question is relevant because a SSD treats deleted data differently than a conventional hard disk. Conventional hard disk vs a SSD Conventional hard disk In this… Read More »