![]() ![]() The size can be 0 in case of sparse extent which has no data on a disk. And finally to target the needed part from the processed data.Īs usual, data on the disk is defined by the start address and the size. Then to process them to obtain file dataģ. NTFS resident file needs to have generation numbers patched in on-disk data before use.Īny of these variants can be described by the scheme including three stages:Ģ. Deduplicated file will have single on-disk location for two different in-file blocks, or two different files. Mirrored file will have two on-disk locations of single in-file data. Preallocated file will have extents where there is data on disk, but it should be ignored. ![]() Sparse file will have extents for which there is no data on disk. Compressed file will have extents where on-disk size does not match the in-file size of the data. As filesystems grow complicated, fragmented file will have multiple extents. As we know unfragmented uncompressed file has one extent. ![]() To get the actual file data additional data processing is often required: uncompressing data for NTFS and BTRFS, patching out generation numbers in NTFS, or processing of different variants of sparse extents if you deal with NTFS, BTRFS, EXT, and XFS. Modern filesystems are often arranged in a much more complex way, and simply copying data from the disk is not enough. A fragmented file is described by several parts which when glued together provide the exact content of a file. Simple cases include HFS +, FAT, ExFAT, and the results of file carving.įor these filesystems the location of a non-fragmented file can be described simply by the location of the beginning of the file on a disk and the length of the file. I should note that understanding of the traces is an easy task only for the old filesystems. ReclaiMe Pro gives you forensic traces for the recovered files in. This applies to both file content and timestamp traces using which you can know creation date, modification date, or last access. Using this feature you can determine what data of a file is obtained from what place on the disk. The first thing we did are forensic traces. We tried to consider your comments, talked with our friends among computer forensics experts, and added some features, which I now want to talk about in this webinar. ![]()
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