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Do those disk wipe utilities make a difference in an SSD?
I've been wondering does it even make sense to have a disk or file wipe
utility in an SSD? Written data doesn't even get written to the same blocks that the previously read data was in an SSD. So basically, all old data still exists until the Trim command is executed, even if you try a wipe of the data. -- Sent from Giganews on Thunderbird on my Toshiba laptop |
#2
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Do those disk wipe utilities make a difference in an SSD?
My Kingston SSD's software has a wipe the disk option.
Seems like if you filled up the capacity of the disk with random stuff it would get everything. I don't know, though. Wiping just one file is another thing. But, no matter where it's really storing it, if it's no longer available in the virtual hard disk representation of the SSD, such that recovery software can't find it, then it should be as good as gone, unless some expert takes it apart or hacks it somehow. I don't know. -- Ed Light Better World News TV Channel: http://realnews.com Send spam to the FTC at Thanks, robots. |
#3
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Do those disk wipe utilities make a difference in an SSD?
On 20/11/2017 2:00 PM, Ed Light wrote:
My Kingston SSD's software has a wipe the disk option. Seems like if you filled up the capacity of the disk with random stuff it would get everything. I don't know, though. Wiping just one file is another thing. But, no matter where it's really storing it, if it's no longer available in the virtual hard disk representation of the SSD, such that recovery software can't find it, then it should be as good as gone, unless some expert takes it apart or hacks it somehow. I don't know. That's my feeling too. But the Trim command should wipe all deleted data too! Yousuf Khan -- Sent from Giganews on Thunderbird on my Toshiba laptop |
#4
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Do those disk wipe utilities make a difference in an SSD?
On Thu, 23 Nov 2017 23:10:52 +0600, Yousuf Khan
wrote: On 20/11/2017 2:00 PM, Ed Light wrote: My Kingston SSD's software has a wipe the disk option. Seems like if you filled up the capacity of the disk with random stuff it would get everything. I don't know, though. Wiping just one file is another thing. But, no matter where it's really storing it, if it's no longer available in the virtual hard disk representation of the SSD, such that recovery software can't find it, then it should be as good as gone, unless some expert takes it apart or hacks it somehow. I don't know. That's my feeling too. But the Trim command should wipe all deleted data too! I don't think the TRIM command is supposed to erase any data. It is only to tell the device that the data in the sectors is not needed anymore. Thus the device is free to not copy the data to a new sector when performing various operations, including the invisible to the user wear leveling. As to the original question, even if you write random data to fill the entire user visible space on the device enough times to account for the extra capacity that the device keeps for working space and spare blocks, you still cannot be sure that there is not some user data that is no longer visible to the user that still stored on the device. Using the devices own encryption should ensure that no clear text user data ever gets on the device, but it is probably depends on the device as to if the data could be recovered from the device with factory/laboratory access. (For example, someone having the decryption key for the user data might be able to decrypt the data if the original user LBA was known or if all possible user LBAs for the sector were known and the billions of possibilities were tried.) |
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