You are reading a single comment by @Velocio and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@Velocio
It turns out expanding BTRFS volumes is slow.
I didn't have all the drives at once, which is preferred as I like buying some different batches. So I started with 5 * 16TB HDD, and then added another... that took 3 days. Now it's working I've just added another, which will take another 2-3 days to expand the volume.
I do realise it's doing a lot of work, effectively redistributing all files and their parity across all of the new space in an even way to guarantee durability... but still, it takes a long time.
Top tip for anyone setting up BTRFS in future, wait until you have all the drives before you create the volume.