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<blockquote data-quote="Winter Soldier" data-source="post: 666032" data-attributes="member: 59377">On all SSD disks, if the operating system supports TRIM, the deleted files are always deleted permanently and they are never recoverable.Hence the uselessness of the operation of wiping that, as in the case of defragmentation, due to the large number of writes, helps to reduce the life of the SSD drive.When you delete a file from an SSD, this not simply marks the corresponding sectors as &quot;free&quot; by making them available for new writes (it is the behavior of a traditional hard drive).In the case of SSDS and flash memory, contents are erased in blocks composed of multiple units called &quot;pages&quot;. When part of the information is removed, for example, at the request of the user, the SSD move the portions of the block that need to be preserved in the new block and then erase the entire block.This process, called garbage collection, contributes a lot to increase the number of writes (write amplification is undesirable but it is inevitable for SSD and flash memory in general).It seems even more clear that the use of utilities like Dban, etc is absolutely counterproductive for the SSD.Dban, because of a large number of writes, helps to reduce the life of the SSD drive and it can not check where the operations are carried on writing. It is in fact the controller of the SSD responsible for the management of the scriptures, not allowing to reach the result.The concept of &quot;secure deletion&quot; in the case of traditional hard drives is so profoundly different compared to SSD and flash memory in general.Typically, then, to securely erase the data by minimizing the write operations, it is sufficient to make sure that the operating system supports the TRIM command and that its use is actually enabled.</blockquote>

[QUOTE="Winter Soldier, post: 666032, member: 59377"] [U]On all SSD disks,[B] if the operating system supports TRIM[/B], the deleted files are always deleted permanently and they are never recoverable.[/U] [U][I]Hence the uselessness of the operation of wiping[/I][/U] that, as in the case of defragmentation, due to the large number of writes, helps to reduce the life of the SSD drive. When you delete a file from an SSD, this not simply marks the corresponding sectors as "free" by making them available for new writes (it is the behavior of a traditional hard drive). In the case of SSDS and flash memory, contents are erased in blocks composed of multiple units called "pages". When part of the information is removed, for example, at the request of the user, the SSD move the portions of the block that need to be preserved in the new block and then erase the entire block. This process, called garbage collection, contributes a lot to increase the number of writes (write amplification is undesirable but it is inevitable for SSD and flash memory in general). It seems even more clear that the use of utilities like Dban, etc is absolutely counterproductive for the SSD. Dban, because of a large number of writes, helps to reduce the life of the SSD drive and it can not check where the operations are carried on writing. It is in fact the controller of the SSD responsible for the management of the scriptures, not allowing to reach the result. The concept of "secure deletion" in the case of traditional hard drives is so profoundly different compared to SSD and flash memory in general. [I]Typically, then, to securely erase the data by minimizing the write operations, it is sufficient to make sure that the operating system supports the TRIM command and that its use is actually enabled.[/I] [/QUOTE]

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