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VMFS File System Recovery

Part 1 – Part 2 – Part 3 – Part 4 VMFS File System Reconstruction (Part 4) In the last three installments we have taken an in depth look at the VMFS file system. As we have seen there are many different components that make up the file system where each component not only does […]

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VMFS File System Reconstruction (Part 3)

Part 1 – Part 2 – Part 3 – Part 4 In the last two sections we covered the coarser portions of the VMFS file system. First we looked at what a volume consists of and the best way to find a volume on a storage device where the file system has been corrupted or […]

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VMFS File System Reconstruction (Part 2)

Part 1 – Part 2 – Part 3 – Part 4 In the first installment of our explanation of rebuilding the VMFS file system from a damaged volume we covered some of the attributes of the volume on disk data structure. In addition to that we reviewed some tools and methods for finding the placement […]

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VMFS File System Reconstruction (Part 1)

Part 1 – Part 2 – Part 3 – Part 4 Recently DTI Data received a challenge in the form of a VMWare ESXi 5.1 server which contained 16 (sixteen) 2 (two) terabyte Seagate ST2000DM001 hard drives. These drives were configured as a RAID 10, 8 (eight) drives for each side of a RAID 0 […]

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Microsoft FAT32 and Integrated Data Recovery

With several years in the data recovery industry there are, like all things, a metamorphosis from one method of recovery to the next. In the beginning there were simple file systems and simple drives and a coarse data recovery method was used in order to retrieve data. This method was based mostly on the hardware side and not […]

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View It Now Software Tool

I am a pretty visual guy and because of that my problem solving skills are based on viewing.  When trying to recover data from a corrupt file system I like to use a hex editor and view the system areas of the drive to make sure that everything is intact.  There have been many times […]

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View It Now NTFS File System Viewer

I have worked with Microsoft file systems since DOS 3.3.  From FAT12, to the current NTFS 5.0 Microsoft has always strived to make their file systems fast and reliable.  However, there has always been one major drawback.  Their file systems have always been too centralized.  What I mean by that is when storing the file system […]

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Hard Drive Recovery and Remote Diagnostics… Old School gone retro…

When I first started writing hard drive recovery software, many, many, years ago Microsoft file systems were pretty straight forward.  It was a simple FAT, with some file entry tables scattered throughout the drive with a few key system components.   In addition, the file system was designed to be fairly virtual.  In other words, if […]

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Recovering Folder Relationships Using DOS Clustering Design

    In my last installment I described what a file entry record would look like if it were in fact a cluster holding file entry data. I went over the fact that the first two entries of the folder cluster would be a period followed by ten spaces, and the next entry would be two […]

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Using FAT32 File Entry Record For Recovering Folders Using Software Logic

  In my last installment I described the file entry record and its on-disk format.  I used a ‘C’ structure to denote the different fields of the record and defined which five are most important to us when trying to recover a FAT32 file system where all the main file system components have been destroyed or […]

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