Hi there!
Im new here.
Im trying to install Centos 8 on my laptop. I also want to have a contingency plan in case something brakes.
My first thoughts were to use LVM.
The idea is that i would take multiple snapshots of the system during the day/week and will keep them for a short time.
I read RHEL documentation about how lvm works and pretty much understand how to manage the above scenario with LVM snapshots and encryption. If i understood lvm snapshots will cause delay the system after multiple snapshots. The best way to avoid it is using thin snapshots.
At rhel documentation it says that is possible for a non thin volume to get a thin snapshots.
[Correct me if my above assumptions are wrong or if there is a better solution for my purpose.]
So i created a group with 3 volumes groups and one thin pool.
Im trying to take a snapshot and i get the message.
"Cannot use writable LV as the external origin."
I read somewhere that i should change it to read only and then take a snapshot. Although that would be a problem i just try it to see if it works. Then i got the message
"Cannot use active LV for the external origin"
Any ideas???
Thanks in advance
Georgios