I’m running out of storage on my rockstor server. Right now it’s raid1, and I’ve already purchased a couple of new drives to add to it.
However the thought also crossed my mind of putting the new drives into a second server (I have most of the other parts laying around already), setting it up do do nightly send/receive or some other form of sync, and making both servers use single/JBOD or maybe raid0. After the initial sync, I’d move the second server to my office and let it sync over the internet.
There’s an obvious benefit of having off-site backup - my data will now survive a house fire, etc, and I can see some additional value in having a server at my office to run rock-ons and whatnot.
I have a few questions, though, and I’d be interested in hearing other folk’s opinions and experiences before committing to this approach:
If a drive dies and gets replaced with a blank one, can BTRFS use the remote sync to intelligently restore just the missing data, or will I have to rebuild the pool from scratch?
I got the impression that btrfs sync is one-way, so to get two-way sync I’d need to have a “home share” and an “office share” with each one being effectively read-only on the other end?
If that’s the case, does anyone have any alternative recommendations for 2-way sync?
Would I need to purchase a second stable updates subscription for the second server?