> as you have less redundancy during the expansion. If the old device is not faulty then the replace operation will keep both old and new in the array until it

> as you have less redundancy during the expansion. If the old device is not faulty then the replace operation will keep both old and new in the array until it is complete. > An enterprise ought to just migrate the entire pool/content to somewhere else and redo it completely. That's also an option with send/receive, but that involves downtime. Drive replacements can be done on a live system. Server grade hardware generally supports hotplug.