ext4 to btrfs

[Patrick U]

Hello

 

I am running a NanoPi M4 (kernel 4.4) with /boot on SD and / on an USB-attached disk. At the time I ran `nand-sata-install` ext4 seemed like a good choice.

 

I want to snapshot the file system as a preparation step to backing up, so it looks like I have 2 choices now:

1. ext4 on LVM

2. btrfs

 

-> Will 1. work with u-boot/armbian at all? Which solution is recommended?

 

My guess is that btrfs would be the easiest, so the next question is

 

-> can I go and a) `btrfs-convert /` b) update rootfs in armbianEnv.txt, or is there any other step involved?

 

Regards

-Patrick