[tecleandor]

You can, although you need to replace all the drives in the pool. You can swap one, wait for resilver (or for a month, if you're in a budget), do the next one... And once you replaced every drive, you do like this:

https://www.ateamsystems.com/tech-blog/expand-zfs-to-use-lar...

[vetinari]

Few years ago, I needed exactly that, and it didn't work.

I guess I'm not alone: https://www.google.com/search?q=zfs+autoexpand+not+working