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7

The trim command does not delete the data but simply marks a block of data as currently unused by the OS. It will probably return the block as zero if asked by the OS (although I don't know if this is guaranteed) but internally the data might be still there and could be extracted when accessing the flash storage directly, which is usually not possible by the ...


4

In theory, yes.* In reality, it depends on the SSD's implementation of TRIM. TRIM is an optimization. Its actual implementation is left up to the manufacturer. Currently, most SSD manufacturers will queue a block for erasure by the garbage collector when it is discarded by TRIM, and this erasure is considered to be irreversible when it actually happens. But ...


2

In the absence of TRIM, an external USB drive (SSD or not) is pure block storage. It just stores 512 or 4096 byte blocks. It doesn't know about files, let alone whether they're deleted.


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First, I have used VeraCrypt on multiple SSDs and haven't had any issues with performance as a result. This includes devices from Samsung and off brand devices as well. The solid state drive, though encrypted, reported the appropriate amount of storage space on my machines and worked as expected. As it applies to SSDs, wear leveling is likely your biggest ...


2

Answers to the comments: first of all some real life example that helps to clarify how both works Think the hard disk (not ssd) as something like this: https://www.zerorelativo.it/item_files/5/9/2/4/3/item_434295.jpg https://i.pinimg.com/736x/19/0c/a1/190ca1d14a5eb7c52a762326042996dd.jpg where the pieces of wood (bits) can be rotated front(1) or back(0)....


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If you want to use regular drive electronics, the answer is, there's absolutely no way to recover the erased data blocks from flash storage like SSDs, USB sticks, SD cards, etc. See https://www.silicon-power.com/blog/index.php/guides/nand-flash-memory-technology-basics/ for some info on how flash memory storage works. The tricky part of securely erasing an ...


1

I haven't tested this particular scenario, but I would expect that TRIM does NOT wipe small file MFT content. TRIM wipes a deallocated (deleted) file. The MFT is a file. Removal of a small file entry from the MFT deallocates the MFT entry header, marking it as available. The MFT file is not deleted, so TRIM would not run against an entry in the MFT. ...


1

First of all some theory: How an hdd works? it has memory cells that can be in only two states: 0 or 1 their values can be easilly changed form 0 to 1 and vice versa since there is no "empty" state, files are never deleted for real; the only edited part is the file list index where the os say "this file is no more important, write over it whenever ...


1

I don't believe TRIM has a major effect on memory clearing; it's wear-leveling that's the main issue, as it means the OS could 'overwrite' data while it still exists on the physical media. TRIM is just telling the drive that a certain area isn't needed, and the drive can do what it likes with it. SATA drives (including SSDs) have the ATA-SE commands, which ...


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