In Windows Server 2012 I copy a large file 13GB (file A) and overwrite to same file name but different path (file B). It prompted overwrite and I click Yes. It copy about 5%, and I immediately press cancel.
My question is did file B any part of the file been amended? It is a database file. Because I notice the modified had been updated.
I create a dummy text file try to simulate the situation again.
Create a file => a\dummy.txt
a>echo aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa > dummy.txt a>for /L %i in (1,1,25) do type dummy.txt >> dummy.txt
Create another file => b\dummy.txt
b>echo bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb > dummy.txt b>for /L %i in (1,1,25) do type dummy.txt >> dummy.txt
It generate about 2GB for each text file.
I tried copy and paste in local PC environment and press yes for replace the file, it run about 10% I press cancel. The destination file just disappeared.
Then, I tried in Network environment, which is the real situation that I was having before. I actually copy from a server A replace to backup server B. The same thing happened. The destination file also disappeared.
When I copy and paste and press cancel. The destination file just disappeared. Any idea to prove the file had been amended?