Works for me. Do you maybe already have a pool called
test? That’s yet another case where
qvm-pool add will result in a such a crummy error *sigh*
However, the legacy
file driver (as opposed to the modern
file-reflink driver) shouldn’t be used anymore. It’s deprecated and may be removed in R4.2.
That bugfix indeed hasn’t been backported to R4.1 yet (@marmarek: it would be a clean cherry-pick). But its only change is to print a better error message on using a wrong driver name, e.g. misspelling
file_reflink like in the ticket.