What I need is to 100% clear and un-format a 3TB drive. Nothing more. It seems doing this from GParted, however when I try to put information onto the drive after formatting with another source, it says the drive is full. This is not a problem with the other source because it was able to copy to my 2nd 3TB drive very well and quickly. Can anyone help me to reset this drive? I am currently away from home, but I am using the Ubuntu "Disks" app to format it, and I have it set to overwrite existing data. Will edit if that changed it.
Don't do the operation from a running system.
Open GParted and delete all partitions.
You can delete all partitions of a disk instead of just formatting them using Gnome Disks as well.
A small dialog window will appear. You have two settings:
Then click on Format..., enter your admin password and watch the progress bar.
If you want to have a really blank disk just do
Under normal conditions this is not necessary but it may be necessary to swipe out the beginning and the end of the disk, because there may be data of a secondary GPT at the end of the disk.
So what I do to clean a disk is:
Now, no OS installer of my knowledge finds any old partitions nor any old installed OS and will setup the disk right correct to the BIOS- and OS-settings (MBR or GPT).