Exactly 
CR is for fast recovery of your entire VM, backup is here to save your VMs on the longer run with the extra capability to restore files.
It's 2 different things
XCP-ng Team
Developers of XCP-ng
Posts
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RE: Restoring a file from a CR Delta
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RE: Best Way to Live Migrate XO VM
I'm not aware of any issue to live migrate XOA VM
We do that very often, as per many many customers and users all around the world. If you are using XO from the sources, I would suggest to try instead with XOA (even Free version is enough) -
RE: Created a new bond interface and lost management connectivity to hosts
The original problem could be a known issue when creating bond including the management interface that we have to investigate. Although the emergency network reset should have fixed that, so maybe it is a mix of the bond creation issue and MTU issue.
In the reinstalled pool, did you create the bonds already? If so I would think changing the MTU should be fine, especially as it worked on other PIF, but with MTU issue it is often quite sneaky, so I would not make any promises either.
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RE: Xcp-ng 8.2 no more recognized with Cloudstack since last update
Indeed, and also you need to ask CloudStack people, because that's very likely related to CS and not XCP-ng
