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    Building Out XenServer 6.5 with USB Boot and Software RAID 10

    Scheduled Pinned Locked Moved IT Discussion
    xenvirtualizationxenserverxenserver 6.5how to
    182 Posts 13 Posters 62.5k Views
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    • RomoR
      Romo
      last edited by

      What is the ouput for:
      cat /dev/md/md-device-map

      1 Reply Last reply Reply Quote 1
      • DustinB3403D
        DustinB3403
        last edited by DustinB3403

        cat /dev/md/md-device-map
        cat: /dev/md/md-device-map: No such file or directory
        
        RomoR 1 Reply Last reply Reply Quote 0
        • RomoR
          Romo @DustinB3403
          last edited by

          @DustinB3403
          ls /dev/ | grep md

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          • DustinB3403D
            DustinB3403
            last edited by

            0_1447096524174_2015-11-09_14-15-08.png

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            • RomoR
              Romo
              last edited by

              @DustinB3403 can you please show us the output of your mdadm.conf file, last time I believe it was cut off because the UUID's dont show.

              DustinB3403D 1 Reply Last reply Reply Quote 1
              • DustinB3403D
                DustinB3403 @Romo
                last edited by

                @Romo 0_1447098513375_2015-11-09_14-48-15.png

                There is now a new record (3rd line)

                1 Reply Last reply Reply Quote 0
                • Reid CooperR
                  Reid Cooper
                  last edited by

                  That can't be right. I'm sure only one of those lines is supposed to be there.

                  1 Reply Last reply Reply Quote 0
                  • RomoR
                    Romo
                    last edited by

                    Quite strange that the first two entries don't have a UUID set, mdadm needs the UUID set.

                    We could try to manually edit the file, adding the UUID from the last entry into the first entry, and then removing entries 2 and 3.

                    DustinB3403D 1 Reply Last reply Reply Quote 0
                    • DustinB3403D
                      DustinB3403 @Romo
                      last edited by

                      @Romo Like so?

                      [root@eaglexen-baby mnt]# cat /etc/mdadm.conf 
                      ARRAY /dev/md0 level=raid10 num-devices=4 metadata=1.2 name=eaglexen-baby:0 UUID=5bd9375b:2166352e:622be934:4b65a7ea
                         devices=/dev/sdb,/dev/sdc,/dev/sdd,/dev/sde metadata=1.2  name=eaglexen-baby:0
                      [root@eaglexen-baby mnt]#
                      
                      1 Reply Last reply Reply Quote 0
                      • RomoR
                        Romo
                        last edited by

                        @DustinB3403 said:

                        ARRAY /dev/md0 level=raid10 num-devices=4 metadata=1.2 name=eaglexen-baby:0 UUID=5bd9375b:2166352e:622be934:4b65a7ea
                        devices=/dev/sdb,/dev/sdc,/dev/sdd,/dev/sde metadata=1.2 name=eaglexen-baby:0

                        ARRAY /dev/md0 level=raid10 num-devices=4 metadata=1.2 name=eaglexen-baby:0 UUID=5bd9375b:2166352e:622be934:4b65a7ea
                        devices=/dev/sdb,/dev/sdc,/dev/sdd,/dev/sde

                        1 Reply Last reply Reply Quote 1
                        • RomoR
                          Romo
                          last edited by

                          Don't need the metadata and name again after the devices

                          1 Reply Last reply Reply Quote 0
                          • DustinB3403D
                            DustinB3403
                            last edited by

                            [root@eaglexen-baby mnt]# cat /etc/mdadm.conf 
                            ARRAY /dev/md0 level=raid10 num-devices=4 metadata=1.2 name=eaglexen-baby:0 UUID=5bd9375b:2166352e:622be934:4b65a7ea devices=/dev/sdb,/dev/sdc,/dev/sdd,/dev/sde
                            
                            1 Reply Last reply Reply Quote 0
                            • RomoR
                              Romo
                              last edited by

                              Yes, seems ok. Reboot and try to check the status of the array once again

                              DustinB3403D 1 Reply Last reply Reply Quote 0
                              • DustinB3403D
                                DustinB3403 @Romo
                                last edited by

                                @Romo said:

                                Yes, seems ok. Reboot and try to check the status of the array once again

                                Rebooted.

                                Array found, drives mounted.

                                1 Reply Last reply Reply Quote 0
                                • DustinB3403D
                                  DustinB3403
                                  last edited by DustinB3403

                                  So now that we're back to working condition. We need an entry added to fstab to auto-mount the array.

                                    GNU nano 1.3.12             File: /etc/fstab                                  
                                  
                                  LABEL=root-mhdhrpdq    /         ext3     defaults   1  1
                                  /var/swap/swap.001          swap      swap   defaults   0  0
                                  none        /dev/pts  devpts defaults   0  0
                                  none        /dev/shm  tmpfs  defaults   0  0
                                  none        /proc     proc   defaults   0  0
                                  none        /sys      sysfs  defaults   0  0
                                  none        /sys/fs/cgroup cgroup memory 0 0
                                  /opt/xensource/packages/iso/XenCenter.iso   /var/xen/xc-install   iso9660   loo$
                                  /mnt/raid10   /dev/md0  ext3  defaults 0  0
                                  
                                  RomoR 1 Reply Last reply Reply Quote 0
                                  • RomoR
                                    Romo
                                    last edited by

                                    Does xencenter see the storage?

                                    1 Reply Last reply Reply Quote 0
                                    • DustinB3403D
                                      DustinB3403
                                      last edited by

                                      Yes, the Local OBR10 is back on XenCenter.

                                      1 Reply Last reply Reply Quote 0
                                      • RomoR
                                        Romo @DustinB3403
                                        last edited by

                                        @DustinB3403 Not so sure about the entry on fstab, I don't have the entry in my setup and xen properly automounts it

                                        DustinB3403D 1 Reply Last reply Reply Quote 0
                                        • DustinB3403D
                                          DustinB3403 @Romo
                                          last edited by DustinB3403

                                          @Romo It's outside of the norm for XenServer.

                                          Even if it's benign.

                                          XenServer by default, doesn't say "oh yeah go build an mdadm array" because it's not ideal if you can avoid it.

                                          RomoR 1 Reply Last reply Reply Quote 0
                                          • RomoR
                                            Romo @DustinB3403
                                            last edited by

                                            @DustinB3403 said:

                                            @Romo It's outside of the norm for XenCenter.

                                            Even if it's benign.

                                            Yes indeed.

                                            1 Reply Last reply Reply Quote 0
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