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Types of acquisitions Static acquisitions and live acquisitions Four methods Bit-stream disk-to-image file Bit-stream disk-to-disk Logical disk-to-disk or disk-to-disk data Sparse data copy of a file or folder Guide to Computer Forensics and InvestigationsĨ Determining the Best Acquisition Method (continued)īit-stream disk-to-image file Most common method Can make more than one copy Copies are bit-for-bit replications of the original drive ProDiscover, EnCase, FTK, SMART, Sleuth Kit, X-Ways, iLook Bit-stream disk-to-disk When disk-to-image copy is not possible Consider disk’s geometry configuration EnCase, SafeBack, SnapCopy Guide to Computer Forensics and Investigationsĩ Determining the Best Acquisition Method (continued) afm for AFF metadata AFF is open source Guide to Computer Forensics and Investigationsħ Determining the Best Acquisition Method Garfinkel of Basis Technology Corporation Design goals Provide compressed or uncompressed image files No size restriction for disk-to-image files Provide space in the image file or segmented files for metadata Simple design with extensibility Open source for multiple platforms and OSs Guide to Computer Forensics and Investigationsĭesign goals (continued) Internal consistency checks for self-authentication File extensions include. Proprietary Formats Features offered Option to compress or not compress image files Can split an image into smaller segmented files Can integrate metadata into the image file Disadvantages Inability to share an image between different tools File size limitation for each segmented volume Guide to Computer Forensics and Investigationsĭeveloped by Dr. Raw Format Makes it possible to write bit-stream data to files Advantages Fast data transfers Can ignore minor data read errors on source drive Most computer forensics tools can read raw format Disadvantages Requires as much storage as original disk or data Tools might not collect marginal (bad) sectors Guide to Computer Forensics and InvestigationsĤ Guide to Computer Forensics and Investigations
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Three formats Raw format Proprietary formats Advanced Forensics Format (AFF) Guide to Computer Forensics and Investigationsģ Guide to Computer Forensics and Investigations 1 Guide to Computer Forensics and Investigations Fourth EditionĢ Understanding Storage Formats for Digital Evidence