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DriveCleanser Necessary?

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I am trying to upgrade my harddrive to a new one. During the process, and before I purchased Acronis True Image, I failed cloning to the new drive, etc. My question is: Before restoring to the new drive, do I need to run DriveCleanser since I have already tried multiple times to clone to the new drive? I guess I don't understand how using "create new disk" to erase the partitions is effectively getting all the data off of the drive. It does it so quick it just doesn't seem to add up that it is erasing it clean. Can someone explain that to me?

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This is just a rough and cursory explanation.

On computer disks, deleting isn't really deleting and formatting isn't really formatting, in sense.

When you delete a file, the contents remain but the file table has the space used by those contents marked as available -- thus the space can be written to and the contents can be overwritten. This is why you can UNdelete a file -- at least until those disk locations are overwritten. Handling Deletion this way is much faster than overwritting all the contents every time you delete a file.

When quick formatting, the low level formatting isn't touched. Just some of the housekeeping is tidied up to show the disk as empty. The contents aren't removed but will be overwritten as the disk is written to. This is why you can UNformat a drive.

If you're concerned that someone might find a way to your disk and pull off in bits and pieces the contents that haven't been overwritten and then piece them together to make sense of them and put them to some impropoer use, then you should overwrite the contents with an overwriter like drive cleanser or other such tool. Otherwise, you needn't worry about it.