In this case, multiple files, sometimes with random names, can be recovered but they do not contain any useful data. One of the secure erase (also known as "disk wiping") utilities was used.
ReclaiMe would specifically report that "The drive was subject to a complete format",Ĭonfirming the fact that the drive is actually blank. In this case, any data recovery utility would show no files at all. A complete format (also called "low level format") was performed on the drive.However, you should try several different data recovery tools before giving up because different programs use different recovery techniques and If data cannot be recovered by data recovery software, it should be considered overwritten. How to confirm data was overwritten in a particular case? Conversely, this is the case of not being able to overwrite some part of the data. However, this is not the case of being able to recover overwritten data. If one disassembles the SSD, removes flash memory chips, and reads them directly, some data may be obtained even after SSD had all its sectors zeroed.Įxactly how many and what data is recovered is determined by SSD controller algorithms. This overprovisioned space is not accessible via normal interface (SATA, SAS, or whatever) and thus cannot be overwritten at will. SSD wear-levelling) so that all memory cells degrade at roughly the same rate and no one cell fails much earlier than others. The extra memory, which can sometimes be as much as 20% of the advertised SSD capacity, is used to balance wear across different cells (so called When an SSD is made, it has more flash memory chips than its advertised capacity. SSDs use over-provisioning to provide better endurance and reliability. Not even from a legacy "non-perpendicular" IDE drive.Īctually, yes. Not from a modern "perpendicular recording" hard drive. For the magnetic memory (hard drives), the technology is only good to recover the faint sound from an erased cassette player tape,.For the flash memory, the technology just does not exist.The secret service must have the technology to do it The computer memory does not retain any trace of its previous state when it is overwritten. It is not possible to recover data that was overwritten. Is it possible to recover overwritten data?
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