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Today, when a user deletes a file from their system, the host only deletes a pointer in the OS file system. This action does not physically erase the data from the drive. While the deleted data no longer appears valid to the OS, it still appears valid to the drive firmware. Since no run time is spent by the drive to physically erase the targeted data this makes the OS operation fast. In terms of performance this method may be advantageous for traditional hard disk drives; however, it provides an unnecessary constraint for Solid-State Drives (SSDs) because they offer higher levels of performance when they hold less data.
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