I've got a Pi2 (running Raspbian Jessie) nicely set up with a 2Tb external USB drive (sda) set up so that I am booting off of
/dev/sda1 (16Gb), downloading torrents to
/dev/sda2 (200Gb) and saving all my important documents on OwnCloud
Filesystem Size Used Avail Use% Mounted on /dev/root 16G 2.0G 13G 14% / /dev/mmcblk0p1 63M 21M 43M 33% /boot /dev/sda3 2.5T 744G 1.7T 31% /media/owncloud /dev/sda2 193G 131G 52G 72% /media/torrent
Now as you can see from the above, I've got about 750Gb stored on my OwnCloud. I'd really rather not lose any of that. And come to think of it, I'd really rather not lose and of the 130Gb in torrents, nor the work I've put into getting the system running JUST how I like it in
So I'm going to be buying a second 2Tb Hdd.
The 1st question is: What is the best way to backup/save this data?
I've not ever set up a RAID array before, but from preliminary research, I'd need to start with 2 blank drives, and then set it up from there. This isn't really a possibility (Question 2: or is it?) as I don't have anywhere to temporarily store the 870+Gb currently on the drive. (Question 3:) Also, can a RAID1 be set up with USB drives?
rsync to back up the primary drive periodically, (Question 4:) but is that the best way to do this? And If it really is... Bonus Question 5: What period should I run (after the initial sync)? Once a day will surely not be enough and every minute may be a bit much.