Hallo, I''ve made a 2-partitions system with mkfs.btrfs -P Probe -m raid1 -d raid0 /dev/sdb1 mount LABEL=Probe /mnt/Probe btrfs device add /dev/sdb2 /mnt/Probe "btrfs-show" (and other tests) showed that all worked well. btrfs device delete /dev/sdb2 /mnt/Probe only showed "error" (I haven''t noticed the long text, something like "can''t delete"); but "dmesg" showed the reason: btrfs: unable to go below two devices on raid1 Could this message also shown in the "regular" error message? Viele Gruesse! Helmut -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html