Assuming that you have NOTHING on the drive that you care about, I would
remove the factory partitioning and create a new GPT table with parted.

Then, format that as ext4.
On Sep 3, 2015 3:17 PM, "Mike Miller" <mbmiller+l at gmail.com> wrote:

> How to format?
>
> I have a couple of Linux boxes that I would like to regularly backup to a
> 5 TB external drive.  It seems like it would be a good idea to format that
> drive with ext4.  Can I just do that with gparted?  The drive comes with
> NTFS format.  Are there any issues I should know about?
>
>
> Which directories to back up?
>
> What really needs to be backed up?  I guess if the system totally failed
> I'd install Linux (Ubuntu) again.  Of course /home is needed, but
> /usr/local and /opt often have programs I've installed and /etc will have a
> bunch of settings.  I guess /var can have some important stuff.  Are
> crontabs stored in /var?
>
>
> Which software to use for backup?
>
> I guess I want only to have in backup what is on the originating drive. So
> if I have deleted a file, I want it to be deleted on the backup drive,
> too.  I assume rsync can do this.  Would this be correct?:
>
> rsync -av --update --delete /home /usr/local /etc /var /opt /media/me/back
>
>
> TIA!
>
> Mike
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