Grow Btrfs volume in another disk

Now that the default filesystem in Fedora 33 is Btrfs, I would like to know if Btrfs has the same capability as LVM + Ext4 to grow a partition in another disk. This topic was illustrated in Fedora Magazine:

I have a laptop with a 128GB SSD and a 1TB HDD, currently running F32.
I intend to upgrade to F33 with the following partition scheme:
Root partition → SSD
/home partition → HDD
This way I can take advantage of the faster read/write speeds of SDDs. However, since 128GB is not a lot of space, I may need to expand the / partition in the future. This is where LVM + Ext4 comes in handy. I can expand the volume into the HDD.
I just wonder if I can do the same with F33’s default B-tree filesystem.


You can add multiple filesystems to a btrfs volume to either expand it or create RAID-like configurations. It’s pretty flexible in my opinion.

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Thanks. I’ll take a look.

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