Way to migrate a drive from ext4 to btrfs in OMV?

Nas-turally · 24. Februar 2020

Hi
btrfs-convert can convert an ext4 drive into a btrfs one, but on an unmounted drive. What's the best way to proceed with OMV? With OMV running, to force unmount from a shell (umount -force), call btrfs-convert then change drive type in /etc/config/openmediavault/config.xml ? Or do it offline by booting on a usb drive and then changing the config.xml ? What do you think about it?

clickwir · 24. Februar 2020

Some years ago, btrfs devs suggested NOT to convert from ext4 anymore. Somewhere around that time I used it and it worked fine. But since seeing them say that, I haven't used it since.

To proceed here: copy data off, create btrfs file system, copy data back.

macom · 24. Februar 2020

Why do you want to use btrfs?
Are you aware that btrfs needs some maintenance?

clickwir · 25. Februar 2020

btrfs has lots of great features and is far more future proof than ext4.

It does not need maintenance, but it doesn't hurt to have some scrubs scheduled.

Way to migrate a drive from ext4 to btrfs in OMV?

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