STORAGE DEVICE, STORAGE DEVICE SYSTEM AND INFORMATION TERMINAL
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United States of America Patent
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Issued Date -
Sep 8, 2016
app pub date -
Jun 5, 2015
filing date -
Jun 5, 2014
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Abstract
The present invention has an object of providing a storage device capable of making recovery of erased data difficult and erasing the data safely. Provided is a storage device system including a driver controlling an interface between a nonvolatile memory and an external host; and a second controller located between the nonvolatile memory and a first controller, the second controller detecting a logical address of an old data area for a deleted or overwritten file, the second controller detecting a logical address of an old data area for a deleted or overwritten file. The second controller writes invalid data to the logical address of the old data area for the deleted or overwritten file.
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