Where to put 20 terabytes?

Question

Backup

I need to handle 20 TB every week. How to do it as safely as possible, since the data is important and more economical? And of course, so that I don’t fill these 20 TB for a month

Answer 1

Add 20 terabytes or erase old ones and write new 20 terabytes?
In the first case, only a well-fed bank account will help you - renting a gigabit channel will cost about 25,000 rubles per month, and 20 terabytes will merge into it for about two days. (I haven't calculated the disk space rent yet).
In the second case, RAID-0 of five disks of 4 terabytes each will help you - for only 50,000 rubles (from mass-produced disks, of course). Do you want secure? Spread somewhere around three million rubles for a medium-level enterprise disk shelf.

Answer 2

It’s worth starting with the fact that you need to put them where there is a channel of at least about 300 Mbps (if I didn’t make a mistake in the calculations), so that these 20 TB are flooded in a week (because after this time you will need to pour new data) .
Keeping your own servers for backups is not an option at all?

Answer 3

In /dev/null, but seriously, in your case, the easiest way is 1 dedicated server with a large number of disks, for example, azure allows you to connect an infinite number of disks to 1 machine. It should be borne in mind that no one will give a guarantee of storage, therefore, just in case, you need to store data in at least 2 copies. The cheapest option for you would be tape storage, but the hardware is not cheap and the reliability is not as good as disks, you need to regularly check the integrity of the backups.
There is another option with distributed storage of this data, but this only makes sense if you have a lot of clients who are willing to share their disk space for you.

Answer 4

Author, how much of this volume do you change? rdiff?