On Fri, Feb 16, 2018 at 10:43:54AM +0800, Sampson Fung wrote: > I have snapshot A on Drive_A. > I send snapshot A to an empty Drive_B. Then keep Drive_A as backup. > I use Drive_B as active. > I create new snapshot B on Drive_B. > > Can I use btrfs send/receive to send incremental differences back to Drive_A? > What is the correct way of doing this?
You can't do it with the existing tools -- it needs a change to the send stream format. Here's a write-up of what's going on behind the scenes, and what needs to change: https://www.spinics.net/lists/linux-btrfs/msg44089.html Hugo. -- Hugo Mills | I can't foretell the future, I just work there. hugo@... carfax.org.uk | http://carfax.org.uk/ | PGP: E2AB1DE4 | The Doctor
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