RE: What happens to information?
August 20, 2015 at 6:56 am
(This post was last modified: August 20, 2015 at 6:57 am by ErGingerbreadMandude.)
The only way to truly "erase" data instantly would be to replace the address space of the data that is being deleted with a seemingly senseless collection of bits simultaneously whilst deletion.
But that would pave way to even move complications and inefficiencies.
Consider this set of bits:
1 0 1 0 1 1 1 0 0 1 0 0 1
Now imagine that you want to delete these bolded bits:
1 0 1 0 1 1 1 0 0 1 0 0 1
Typically,to delete those bits the bits would have to be "shifted" like this:
#1 : 1 0 1 0 1 1 0 0 1 0 0 1 0
#2: 1 0 1 0 1 0 0 1 0 0 1 0 0
#3: 1 0 1 0 0 0 1 0 0 1 0 0 0
As you can see,the previous data has been replaced with even more data,in a particularly inefficient manner which would take a relatively considerable amount of time for huge size's of data,even for 1 or 2 gigabytes of data.So technically speaking,your computer wouldn't be able to free space when you delete something because that particular data would have to be replaced with unrelated bits to actually delete the data.Hence the reason why OS's follow the current method.
I don't know how programs like CCleaner operate but i would never trust them completely.
But that would pave way to even move complications and inefficiencies.
Consider this set of bits:
1 0 1 0 1 1 1 0 0 1 0 0 1
Now imagine that you want to delete these bolded bits:
1 0 1 0 1 1 1 0 0 1 0 0 1
Typically,to delete those bits the bits would have to be "shifted" like this:
#1 : 1 0 1 0 1 1 0 0 1 0 0 1 0
#2: 1 0 1 0 1 0 0 1 0 0 1 0 0
#3: 1 0 1 0 0 0 1 0 0 1 0 0 0
As you can see,the previous data has been replaced with even more data,in a particularly inefficient manner which would take a relatively considerable amount of time for huge size's of data,even for 1 or 2 gigabytes of data.So technically speaking,your computer wouldn't be able to free space when you delete something because that particular data would have to be replaced with unrelated bits to actually delete the data.Hence the reason why OS's follow the current method.
I don't know how programs like CCleaner operate but i would never trust them completely.
