Hello, I'm still at the beginning but quite interested in ZFS since I only want to use ssd's. Sadly, I already created a zfs pool with the "zpool create ABC raidz /dev/sdb /dev/sdc" and now when I try to type "zpool create -m /mnt/SSD SSD mirror sdx sdy" the message: /dev/sdb is in use and contains a unknown filesystem. /dev/sdc is in use and contains a unknown filesystem. is shown. I'm afraid that the mount point may be different when I don't use the zpool create -m command. I tried deleting the system (writing 0s for the first 100mb) but it didn't help.