tks for reply ,my unraid A is 6.8.2 ,and when i put the HDD Into unraid b( 6.9.0 beta35), HDD Is unassigned ,and i assign it to a disk3, the HDD fs show "auto", and i also have a 4T parity hdd on unraid b, when a start array , unraid seem to move data. after that , unraid b tell me format HDD ,i do that。 HDD fs became “xfs”.and ,i lost my gitlab-ce data on unrad B disk1...😂