Lost Raid5

    • OMV 3.x
    • Resolved

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    • hello after a reboot, omv lost my 6*2TB raid5.
      It doesn't appear in the web interface

      At boot it said that 2 drive were faulty, but the drive appear green in the web interface

      so
      1. cat /proc/mdstat
      Personalities : [raid6] [raid5] [raid4]
      unused devices: <none>

      1. blkid
      /dev/sda1: UUID="3abc1926-a277-4c6b-a4c1-e8fc9a4db381" TYPE="ext4" PARTUUID="a9d47ec6-01"
      /dev/sda5: UUID="ba395bad-8304-4088-8cbf-423a5570e3d9" TYPE="swap" PARTUUID="a9d47ec6-05"
      /dev/sdc: UUID="c42bd49b-4735-0adb-4252-69c01fec9ead" UUID_SUB="75769897-88a7-8f4a-2fa7-cbfedcbbf4ca" LABEL="openmediavault:NAS" TYPE="linux_raid_member"
      /dev/sdb1: LABEL="NGS" UUID="c266f89c-ade1-4474-acb3-b06328d0c430" TYPE="ext4" PARTUUID="7d9760d7-cfc6-4234-89d6-183e289607cc"
      /dev/sdd: UUID="c42bd49b-4735-0adb-4252-69c01fec9ead" UUID_SUB="c8ada145-ff08-0c8b-62dd-e0d256e5bcaa" LABEL="openmediavault:NAS" TYPE="linux_raid_member"
      /dev/sde: UUID="c42bd49b-4735-0adb-4252-69c01fec9ead" UUID_SUB="8361d72b-1bf4-a501-e97c-285ee2e72bff" LABEL="openmediavault:NAS" TYPE="linux_raid_member"
      /dev/sdf: UUID="c42bd49b-4735-0adb-4252-69c01fec9ead" UUID_SUB="abe575c5-e310-7a7a-5419-eb0764b00054" LABEL="openmediavault:NAS" TYPE="linux_raid_member"
      /dev/sdg: UUID="c42bd49b-4735-0adb-4252-69c01fec9ead" UUID_SUB="ba626cc6-4be5-7aee-503a-19f6f177f8ff" LABEL="openmediavault:NAS" TYPE="linux_raid_member"
      /dev/sdh: UUID="c42bd49b-4735-0adb-4252-69c01fec9ead" UUID_SUB="281b8ef3-eff4-f085-9472-611ae4620f64" LABEL="openmediavault:NAS" TYPE="linux_raid_member"

      1. fdisk -l | grep "Disk "
      Disk /dev/sda: 7,5 GiB, 8004132864 bytes, 15633072 sectors
      Disk identifier: 0xa9d47ec6
      Disk /dev/sdc: 1,8 TiB, 2000398934016 bytes, 3907029168 sectors
      Disk /dev/sdb: 279,5 GiB, 300090728448 bytes, 586114704 sectors
      Disk identifier: 9DDDBB99-C85E-48CD-BB9D-7849E4777D92
      Disk /dev/sdd: 1,8 TiB, 2000398934016 bytes, 3907029168 sectors
      Disk identifier: 0x00011257
      Disk /dev/sde: 1,8 TiB, 2000398934016 bytes, 3907029168 sectors
      Disk identifier: 0x0005e98b
      Disk /dev/sdf: 1,8 TiB, 2000398934016 bytes, 3907029168 sectors
      Disk identifier: 0x000a55a7
      Disk /dev/sdg: 1,8 TiB, 2000398934016 bytes, 3907029168 sectors
      Disk /dev/sdh: 1,8 TiB, 2000398934016 bytes, 3907029168 sectors


      1. cat /etc/mdadm/mdadm.conf
      # mdadm.conf
      #
      # Please refer to mdadm.conf(5) for information about this file.
      #

      # by default, scan all partitions (/proc/partitions) for MD superblocks.
      # alternatively, specify devices to scan, using wildcards if desired.
      # Note, if no DEVICE line is present, then "DEVICE partitions" is assumed.
      # To avoid the auto-assembly of RAID devices a pattern that CAN'T match is
      # used if no RAID devices are configured.
      DEVICE partitions

      # auto-create devices with Debian standard permissions
      CREATE owner=root group=disk mode=0660 auto=yes

      # automatically tag new arrays as belonging to the local system
      HOMEHOST <system>

      # definitions of existing MD arrays
      ARRAY /dev/md127 metadata=1.2 name=openmediavault:NAS UUID=c42bd49b:47350adb:425269c0:1fec9ead

      1. mdadm --detail --scan --verbose
      nothing appears....
    • What does this say: mdadm --assemble --force --verbose /dev/md127 /dev/sd[cdefgh]
      omv 4.1.8.2 arrakis | 64 bit | 4.15 proxmox kernel | omvextrasorg 4.1.9
      omv-extras.org plugins source code and issue tracker - github.com/OpenMediaVault-Plugin-Developers

      Please read this before posting a question.
      Please don't PM for support... Too many PMs!
    • it says :

      mdadm --assemble --force --verbose /dev/md127 /dev/sd[cdefgh]
      mdadm: looking for devices for /dev/md127
      mdadm: /dev/sdc is identified as a member of /dev/md127, slot 3.
      mdadm: /dev/sdd is identified as a member of /dev/md127, slot 0.
      mdadm: /dev/sde is identified as a member of /dev/md127, slot 1.
      mdadm: /dev/sdf is identified as a member of /dev/md127, slot 4.
      mdadm: /dev/sdg is identified as a member of /dev/md127, slot 5.
      mdadm: /dev/sdh is identified as a member of /dev/md127, slot 2.
      mdadm: forcing event count in /dev/sdd(0) from 35080 upto 35088
      mdadm: forcing event count in /dev/sdc(3) from 35080 upto 35088
      mdadm: added /dev/sde to /dev/md127 as 1
      mdadm: added /dev/sdh to /dev/md127 as 2
      mdadm: added /dev/sdc to /dev/md127 as 3
      mdadm: added /dev/sdf to /dev/md127 as 4
      mdadm: added /dev/sdg to /dev/md127 as 5
      mdadm: added /dev/sdd to /dev/md127 as 0
      mdadm: /dev/md127 has been started with 6 drives.
      root@openmediavault:~#
    • since that worked, now do: omv-mkconf mdadm

      It will probably be slow while it is rebuilding.
      omv 4.1.8.2 arrakis | 64 bit | 4.15 proxmox kernel | omvextrasorg 4.1.9
      omv-extras.org plugins source code and issue tracker - github.com/OpenMediaVault-Plugin-Developers

      Please read this before posting a question.
      Please don't PM for support... Too many PMs!