2018-01-08 16:20 GMT+01:00 Wols Lists [off-list ref]:

Okay, you need spare ports to do a --replace so it's not always
possible, but it's always desirable. And with enough spare ports, you
can replace more than one drive at once, again with NO loss of redundancy.

I have 3 ports available, so I can replace 3 disks at once.
Any hint on the exact command so that I can safely test on a test server ?