Sustainability of Digital Formats: Planning for Library of Congress Collections |
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Introduction | Sustainability Factors | Content Categories | Format Descriptions | Contact |
Full name | Expert Witness Compression Format, ASR SMART |
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Description |
Version of the EWF bitstream image format from ASR Data (SMART brand), generally similar to the description offered in EWF_Family. EWF_SMART files contain four sections:
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Production phase | Typically used for data analysis and not part of a process to create new content. May be used to archive data. |
Relationship to other formats | |
Subtype of | EWF_Family, Expert Witness Format (EWF) Family |
LC experience or existing holdings | |
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LC preference |
Disclosure | Fully documented. Proprietary format developed by ASR Data. Documentation freely available; formerly on the ASR Data Web site (http://www.asrdata.com/SMART/whitepaper.html), now available at the Internet Archive. Same documentation also available on Simson Garfinkel's Forensics Wiki. |
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Documentation | Internet Archive copy at various URLs, including https://web.archive.org/web/20070202102106/http://www.asrdata.com/SMART/whitepaper.html; Forensics Wiki version at http://forensicswiki.org/wiki/ASR_Data%27s_Expert_Witness_Compression_Format |
Adoption | Not investigated at this time. In archives (as distinct from legal and law enforcement settings), where tools like Bit Curator and FTK Imager are in wide use, user comments suggest that EWF_E01 and AFF (description forthcoming) are most frequently employed. |
Licensing and patents | Not investigated at this writing. |
Transparency | See EWF_family |
Self-documentation | See EWF_family |
External dependencies | None |
Technical protection considerations | See EWF_family |
Tag | Value | Note |
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Filename extension | s01 |
Filename extensions for the first 99 content segments are .s01, .s02, through .s99; followed by .saa, .sab, and so on. |
Magic numbers | Hex: 45 56 46 09 0D 0A FF 00 ASCII: EVF...ΓΏ. |
From Gary Kessler's File Signatures Table. |
General | |
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History |
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