Tag: Flash memory

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Research Shows: Solid State Drives Are More Difficult to Erase

We have been erasing hard drives and other storage mediums for years now with much success by overwriting the data with zeros and ones several times.  However, with the adoption of SSDs that may not be sufficient anymore.  According to researches at the University of California at San Diego, “newer solid state disks have a much different internal architecture, so it is unclear whether what has worked on magnetic media will work on SSDs as well.”

The researchers study shows that after trying 14 sanitizing techniques on SSDs ranging from Gutman’s 35-pass method to the Schneier 7-pass method they found is that every data-erasing technique left at least 10MB of recoverable data from a 100MB file.  In some techniques, such as overwriting the chip with pseudorandom data or using a British HMG IS5 baseline, left nearly all data intact.

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