Unallocated space analysis is one of the major principles of data recovery. Most modern recovery tools integrate the ability to analyze unallocated sectors in one way or another. Unlike the traditional data recovery approach based on looking up for deleted records in the file system, unallocated space analysis only uses the file system to determine which parts of the disk are currently unused by files, the file system and other system structures.
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Posts in category Data Recovery Technologies
Unallocated Disk Space Analysis
Disk Fragmentation and File Carving: Part II
Is disk fragmentation such a huge issue in the context of data recovery? Various sources report that, while normally disk fragmentation is rather low in modern systems, fragmentation rates for user content such as photos, documents and videos can reach 16 to almost 60 per cent due to frequent overwrites. Having the ability to recover fragmented files would be great for any data recovery user.
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Disk Fragmentation and File Carving: Part I
Did you ever encounter mentions of a “file carving” technique used to recover information from formatted, corrupted and inaccessible disks? Originally, file carving (or data carving) was invented as a technique used by forensic specialists to recover evidence a suspect attempted to destroy. In the context of data recovery tools, the term is almost never used correctly. In this article, we’ll discuss the data carving technique and talk about the differences between this technology and the more commonly available signature search analysis.
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How Data Is Recovered
Recovering data from different types of storage media require very different approaches. With a large variety of storage technologies and storage issues unique to certain types of storage media, data recovery from a damaged disk can be a matter of simply pushing a few buttons in a data recovery tool – or an extremely complex endeavor depending on what exactly caused the damage, what type of storage media is concerned, and what the user has done to the disk before resorting to a professional solution.
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Data Backups: Also Not a Perfect Panacea
The previous article discussed the principles and limitations of redundant RAID arrays used to build a fault-tolerant system. With RAID arrays not being a guarantee of data integrity, what is? Common belief is that regular backups are a perfect solution. Indeed, a carefully thought of and properly implemented backup policy will get you close to perfection – but not quite the absolute safety touted by backup apologists. This article discusses the benefits and limitations of regular backups in achieving the ultimate safety and accessibility of your data.
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Data Recovery: Beyond Software
In the previous article named “When Data Recovery Software Will Not Help” we were discussing situations when software can do nothing or very little. In this guide, we’re looking at ways to handle a situation of a physically failed hard drive containing important information.
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Operational Principles of Data Recovery Tools
In order to understand why signature-search is such an important tool, first we need to learn how Windows handles files that you delete, and what data recovery tools need to do to undelete the file.
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Data Recovery Technologies: Signature-Search
Called by many trade names, signature-search is one of the most important technologies found in today’s data recovery products. This technology enables products finding information that no longer appears in the file system, effectively allowing the user to recover files from formatted, repartitioned and otherwise corrupted storage media. However, just as many other technologies, signature-search has its limitations. This article explains real-world benefits and limitations of signature-search.
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