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mdadm.md (521B)


      1 # mdadm
      2 
      3 https://www.tecmint.com/manage-software-raid-devices-in-linux-with-mdadm/
      4 
      5 ```
      6 cat /proc/mdstat
      7 cat /etc/mdadm.conf
      8 sudo mdadm --query /dev/md127
      9 sudo mdadm --detail /dev/md127
     10 sudo mdadm --examine /dev/sdb1
     11 sudo mdadm --manage /dev/md127 --re-add /dev/sdb1 # if using same disk
     12 sudo mdadm --manage /dev/md127 --add /dev/sdb1 # if using new disk
     13 ```
     14 
     15 * had to run this when one of the disks was offline on boot and the system dropped into maintenance mode
     16 ```
     17 mdadm --stop /dev/md127
     18 mdadm --assemble --scan
     19 ```