Solid State Drive (SSD) Forensics
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:
- 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.
- Each flash page consists of multiple blocks. Typically block size is 512 bytes and page size is 2KiB, 4KiB, or larger.
- 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.
Michael Wei, Laura M. Grupp, Frederick M. Spada, Steven Swanson - Reliably Erasing Data from Flash-Based Solid State Drives
- FAST 2011 ,2011
BibtexAuthor : Michael Wei, Laura M. Grupp, Frederick M. Spada, Steven Swanson
Title : Reliably Erasing Data from Flash-Based Solid State Drives
In : FAST 2011 -
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
BibtexAuthor : 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 -
- ATA Trim / Delete Notification Support in Windows 7, Neal Christiansen, Storage Developer 2009
- Challenges of SSD Forensic Analysis, Digital Assembly.
- Solid State Drives: Ruining Forensics, by Scott Moulton, DEFCON 16 (2008)
- Scott Moulton, Shmoocon 20008, SSD drives vs. Hard Drives.
- Risky Business #185, Peter Gutmann talks SSD forensics, March 4, 2011 (Radio Show)