I do not see a possibility to format the pool using the GUI. Shouldn't it format automatically after pressing "Apply" in the Raid Settings of the first drive?
Creating a ZFS pool of 4 drives gives error message "Unmountable: wrong or no file system" when starting the (empty) array. No partitions are created. However, "zpool create raid raidz1 /dev/sdb /dev/sdc /dev/sdd /dev/sde" works flawlessly. Same behavior in 7.0.1 and 7.1.2. tower-diagnostics-20250530-1527.zip