RAID status after HDD fail/removal while server is turned off

  • I am looking for reliable solution for home/small office NAS decided to try OpenMediaVault


    Created RAID6 with 5 drives
    Tried to simulate drive failure:


    Turned server off and disconnected one random drive,
    but after powering NAS on I could not find any RAID in web UI.
    (disconnecting drive when server is running as expected degrades RAID)


    Then SSH'ed
    and diagnosed using terminal shows that array status is inactive
    solved with mdadm --manage /dev/mdX --run


    Is this intended behavior or bug?


    TL;DR: if HDD fails/is disconnected when system is powered down RAID disappears from web UI, need to run md from terminal for it reaper in UI. Feature?Bug?

  • The above does not 'simulate' a drive failure, cat /proc/mdstat will show the raid as inactive have a look here

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