mdadm RAID comes up inactive each reboot

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I have a mdadm software RAID6 that comes up inactive upon each reboot. All its disk are present but shown as spares. How do I make it start operational (active)?



This is it's state after reboot:



cat /proc/mdstat 
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] 
md0 : inactive sdg[2](S) sdf[1](S) sde[3](S) sdc[5](S) sdb[0](S) sda[4](S)
 xxxxxx blocks
unused devices: <none>


again here



sudo mdadm --detail --scan 
INACTIVE-ARRAY /dev/md0 metadata=0.90 UUID=xxx


It can be manually assembled after I stop it:



sudo mdadm --manage --stop /dev/md0
mdadm: stopped /dev/md0
sudo mdadm --assemble --scan
mdadm: /dev/md0 has been started with 6 drives.
sudo mdadm --detail --scan
ARRAY /dev/md0 metadata=0.90 bitmap=/media/intent.bin UUID=xxx


I'm on Ubuntu 18.04.1 LTS



4.15.0-36-generic #39-Ubuntu SMP Mon Sep 24 16:19:09 UTC 2018 x86_64 GNU/Linux



mdadm - v4.1-rc1 - 2018-03-22






mdadm






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    up vote
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    down vote

    favorite












    I have a mdadm software RAID6 that comes up inactive upon each reboot. All its disk are present but shown as spares. How do I make it start operational (active)?



    This is it's state after reboot:



    cat /proc/mdstat 
    Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] 
    md0 : inactive sdg[2](S) sdf[1](S) sde[3](S) sdc[5](S) sdb[0](S) sda[4](S)
     xxxxxx blocks
    unused devices: <none>


    again here



    sudo mdadm --detail --scan 
    INACTIVE-ARRAY /dev/md0 metadata=0.90 UUID=xxx


    It can be manually assembled after I stop it:



    sudo mdadm --manage --stop /dev/md0
    mdadm: stopped /dev/md0
    sudo mdadm --assemble --scan
    mdadm: /dev/md0 has been started with 6 drives.
    sudo mdadm --detail --scan
    ARRAY /dev/md0 metadata=0.90 bitmap=/media/intent.bin UUID=xxx


    I'm on Ubuntu 18.04.1 LTS



    4.15.0-36-generic #39-Ubuntu SMP Mon Sep 24 16:19:09 UTC 2018 x86_64 GNU/Linux



    mdadm - v4.1-rc1 - 2018-03-22






    mdadm






    share























      up vote
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      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I have a mdadm software RAID6 that comes up inactive upon each reboot. All its disk are present but shown as spares. How do I make it start operational (active)?



      This is it's state after reboot:



      cat /proc/mdstat 
      Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] 
      md0 : inactive sdg[2](S) sdf[1](S) sde[3](S) sdc[5](S) sdb[0](S) sda[4](S)
       xxxxxx blocks
      unused devices: <none>


      again here



      sudo mdadm --detail --scan 
      INACTIVE-ARRAY /dev/md0 metadata=0.90 UUID=xxx


      It can be manually assembled after I stop it:



      sudo mdadm --manage --stop /dev/md0
      mdadm: stopped /dev/md0
      sudo mdadm --assemble --scan
      mdadm: /dev/md0 has been started with 6 drives.
      sudo mdadm --detail --scan
      ARRAY /dev/md0 metadata=0.90 bitmap=/media/intent.bin UUID=xxx


      I'm on Ubuntu 18.04.1 LTS



      4.15.0-36-generic #39-Ubuntu SMP Mon Sep 24 16:19:09 UTC 2018 x86_64 GNU/Linux



      mdadm - v4.1-rc1 - 2018-03-22






      mdadm






      share













      I have a mdadm software RAID6 that comes up inactive upon each reboot. All its disk are present but shown as spares. How do I make it start operational (active)?



      This is it's state after reboot:



      cat /proc/mdstat 
      Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] 
      md0 : inactive sdg[2](S) sdf[1](S) sde[3](S) sdc[5](S) sdb[0](S) sda[4](S)
       xxxxxx blocks
      unused devices: <none>


      again here



      sudo mdadm --detail --scan 
      INACTIVE-ARRAY /dev/md0 metadata=0.90 UUID=xxx


      It can be manually assembled after I stop it:



      sudo mdadm --manage --stop /dev/md0
      mdadm: stopped /dev/md0
      sudo mdadm --assemble --scan
      mdadm: /dev/md0 has been started with 6 drives.
      sudo mdadm --detail --scan
      ARRAY /dev/md0 metadata=0.90 bitmap=/media/intent.bin UUID=xxx


      I'm on Ubuntu 18.04.1 LTS



      4.15.0-36-generic #39-Ubuntu SMP Mon Sep 24 16:19:09 UTC 2018 x86_64 GNU/Linux



      mdadm - v4.1-rc1 - 2018-03-22






      mdadm




      mdadm





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      asked 6 mins ago









      Diego

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