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