Difference between revisions of "Solid State Drive (SSD) Forensics"

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  keywords = {cell phone, computer forensics, file carving, flash-memory dumps, forensics},
 
  keywords = {cell phone, computer forensics, file carving, flash-memory dumps, forensics},
 
}  
 
}  
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</bibtex>
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<bibtex>
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@mastersthesis{regan:2009,
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  title="The Forensic Potential of Flash Memory",
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  author="James E. Regan",
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  school="Naval Postgraduate School",
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  address="Monterey, CA",
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  date=Sep,
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  year=2009,
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  pages=86,
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  url="http://handle.dtic.mil/100.2/ADA509258"
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}
 
</bibtex>
 
</bibtex>
  

Revision as of 14:23, 22 March 2011

Solid State Drives pose a variety of interesting challenges for computer forensics. Most SSD devices are based on flash memory. Flash has two properties that complicate its use in computer storage systems:

  1. Unlike normal hard drives that can be written in a single pass, flash memory is arranged in pages that must first be erased before it can be written.
  2. Each flash page consists of multiple blocks. Typically block size is 512 bytes and page size is 2KiB, 4KiB, or larger.
  3. Each page can be erased and rewritten a limited number of times---typically 1000 to 10,000. (Hard drive sectors, in contrast, can be rewritten millions of times or more.)

To overcome these problems, SSD manufacturers have created a system for wear leveling---that is, spreading the writes to flash out among different sectors. Wear leveling is typically done with a flash translation layer that maps logical sectors (or LBAs) to physical pages. Most FTLs are contained within the SSD device and are not accessible to end users.

Bibliography

Michael Wei, Laura M. Grupp, Frederick M. Spada, Steven Swanson - Reliably Erasing Data from Flash-Based Solid State Drives
FAST 2011 ,2011
http://cseweb.ucsd.edu/users/m3wei/assets/pdf/FMS-2010-Secure-Erase.pdf
Bibtex
Author : Michael Wei, Laura M. Grupp, Frederick M. Spada, Steven Swanson
Title : Reliably Erasing Data from Flash-Based Solid State Drives
In : FAST 2011 -
Address :
Date : 2011

Graeme B. Bell, Richard Boddington - Solid State Drives: The Beginning of the End for Current Practice in Digital Forensic Recovery?
Journal of Digital Forensics, Security and Law 5,2011
http://www.jdfsl.org/subscriptions/JDFSL-V5N3-Bell.pdf
Bibtex
Author : Graeme B. Bell, Richard Boddington
Title : Solid State Drives: The Beginning of the End for Current Practice in Digital Forensic Recovery?
In : Journal of Digital Forensics, Security and Law -
Address :
Date : 2011

Billard, David, Hauri, Rolf - Making sense of unstructured flash-memory dumps
Proceedings of the 2010 ACM Symposium on Applied Computing pp. 1579--1583, New York, NY, USA,2010
http://doi.acm.org/10.1145/1774088.1774426
Bibtex
Author : Billard, David, Hauri, Rolf
Title : Making sense of unstructured flash-memory dumps
In : Proceedings of the 2010 ACM Symposium on Applied Computing -
Address : New York, NY, USA
Date : 2010

James E. Regan - The Forensic Potential of Flash Memory
Master's Thesis, Naval Postgraduate School , Monterey, CA,2009
http://handle.dtic.mil/100.2/ADA509258
Bibtex
Author : James E. Regan
Title : The Forensic Potential of Flash Memory
In : Master's Thesis, Naval Postgraduate School -
Address : Monterey, CA
Date : 2009

Presentations