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Now I was sitting down again to install without md-raid and without XFS-root. I can reconfirm, that the described problem does not appear with BTRFS-raid only: > /dev/sda5 btrfs 46872576 2298224 44044944 5% / > udev devtmpfs 10240 0 10240 0% /dev > tmpfs tmpfs 769428 8936 760492 2% /run > tmpfs tmpfs 1923568 0 1923568 0% /dev/shm > tmpfs tmpfs 5120 0 5120 0% /run/lock > tmpfs tmpfs 1923568 0 1923568 0% /sys/fs/cgroup > /dev/sda6 btrfs 74217472 1280 72051712 1% /home > /dev/sda1 xfs 972460 88268 884192 10% /boot > /dev/sdb1 xfs 30712168 3630772 27081396 12% /mnt/usb > Disk /dev/mmcblk0: 59.5 GiB, 63864569856 bytes, 124735488 sectors > Units: sectors of 1 * 512 = 512 bytes > Sector size (logical/physical): 512 bytes / 512 bytes > I/O size (minimum/optimal): 512 bytes / 512 bytes > Disklabel type: dos > Disk identifier: 0xe2290299 > > Device Boot Start End Sectors Size Id Type > /dev/mmcblk0p1 2048 46874623 46872576 22.4G 83 Linux > /dev/mmcblk0p2 46876670 121094143 74217474 35.4G 5 Extended > /dev/mmcblk0p5 46876672 121094143 74217472 35.4G 83 Linux > > Disk /dev/sda: 232.9 GiB, 250059350016 bytes, 488397168 sectors > Units: sectors of 1 * 512 = 512 bytes > Sector size (logical/physical): 512 bytes / 512 bytes > I/O size (minimum/optimal): 512 bytes / 512 bytes > Disklabel type: dos > Disk identifier: 0x40bc4016 > > Device Boot Start End Sectors Size Id Type > /dev/sda1 * 2048 1953791 1951744 953M 83 Linux > /dev/sda2 1955838 130861055 128905218 61.5G 5 Extended > /dev/sda5 1955840 48828415 46872576 22.4G 83 Linux > /dev/sda6 48830464 123047935 74217472 35.4G 83 Linux > /dev/sda7 123049984 130861055 7811072 3.7G 82 Linux swap / Solaris The setup-history was as follows: # btrfs device add -f /dev/mmcblk0p1 / # btrfs balance start -v -mconvert=raid1 -dconvert=raid1 / # btrfs device add -f /dev/mmcblk0p5 /home # btrfs balance start -v -mconvert=raid1 -dconvert=raid1 /home (init 6) # echo "deb http://ftp2.debian.org/debian jessie-backports main contrib non-free" # >> /etc/apt/sources.list # echo "Package: *" >> /etc/apt/preferences # echo "Pin: release a=jessie-backports" >> etc/apt/preferences # echo "Pin: release a=jessie-backports" >> /etc/apt/preferences # echo "Pin-Priority: 520" >> /etc/apt/preferences # echo "alias ate='aptitude'" >> .profile # source .profile # ate update # ate upgrade It is workable now, so the problem may be located in the vicinity of systemd, but it actually does not show without XFS on md-RAID and hybrid filesystem-/. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAljKSEkACgkQ5+rBHyUt5wssHACePKxJiCRAG5u2N/u2ACDFoOTb +eYAmgOFKuToOvn/2pD1fi7yAvYuth1v =iXTk -----END PGP SIGNATURE-----