Объединить / увеличить 2 рейда

У меня есть два рейда, raid5 (md0) и raid1 (md128). Как я могу расширить «/»? OS теперь находится на рейде 5.

    root@backup:~# cat /proc/mdstat
    Personalities : [raid1] [raid6] [raid5] [raid4] [linear] [multipath] [raid0] [raid10]
    md128 : active raid1 sde1[1] sdd1[0]
          2930134016 blocks super 1.2 [2/2] [UU]
          bitmap: 0/22 pages [0KB], 65536KB chunk

    md0 : active raid5 sdc1[2] sdb1[1] sda1[0]
          1953259520 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU]
          bitmap: 3/8 pages [12KB], 65536KB chunk


    root@backup:~# df -T
    Filesystem     Type      1K-blocks    Used  Available Use% Mounted on
    udev           devtmpfs    1841008       0    1841008   0% /dev
    tmpfs          tmpfs        378804   10440     368364   3% /run
    /dev/md0p1     ext4     1918608432 1800052 1819325628   1% /
    tmpfs          tmpfs       1894020       0    1894020   0% /dev/shm
    tmpfs          tmpfs          5120       0       5120   0% /run/lock
    tmpfs          tmpfs       1894020       0    1894020   0% /sys/fs/cgroup
    tmpfs          tmpfs        378804       0     378804   0% /run/user/0


root@backup:~# sudo lsblk -f
    NAME        FSTYPE            LABEL            UUID                                   MOUNTPOINT
    sda
    └─sda1      linux_raid_member backup:0         9c8af56c-1472-3844-c14b-5ff1fd2469cc
      └─md0
        ├─md0p1 ext4                               9f23d9b1-5573-4adb-bd98-11c06dc46602   /
        ├─md0p2
        └─md0p5 swap                               5e5c48d6-2fde-48b8-845b-796c9980e9c5   [SWAP]
    sdb
    └─sdb1      linux_raid_member backup:0         9c8af56c-1472-3844-c14b-5ff1fd2469cc
      └─md0
        ├─md0p1 ext4                               9f23d9b1-5573-4adb-bd98-11c06dc46602   /
        ├─md0p2
        └─md0p5 swap                               5e5c48d6-2fde-48b8-845b-796c9980e9c5   [SWAP]
    sdc
    └─sdc1      linux_raid_member backup:0         9c8af56c-1472-3844-c14b-5ff1fd2469cc
      └─md0
        ├─md0p1 ext4                               9f23d9b1-5573-4adb-bd98-11c06dc46602   /
        ├─md0p2
        └─md0p5 swap                               5e5c48d6-2fde-48b8-845b-796c9980e9c5   [SWAP]
    sdd
    └─sdd1      linux_raid_member 192-168-0-11:128 d4539e00-7885-2a62-84a0-94c1884e253c
      └─md128   LVM2_member                        wp1Qak-hzu5-Eb2q-JNvb-aceu-mhQf-703K5N
    sde
    └─sde1      linux_raid_member 192-168-0-11:128 d4539e00-7885-2a62-84a0-94c1884e253c
      └─md128   LVM2_member                        wp1Qak-hzu5-Eb2q-JNvb-aceu-mhQf-703K5N


root@backup:~# dumpe2fs /dev/md128 | grep -i superblock
    dumpe2fs 1.42.13 (17-May-2015)
    dumpe2fs: Bad magic number in super-block while trying to open /dev/md128
    Couldn't find valid filesystem superblock.