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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 62.6k Views
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    • DustinB3403D
      DustinB3403 @Romo
      last edited by

      @Romo said:

      @DustinB3403 what is in your mdadm.conf?

      0_1447093272983_2015-11-09_13-21-02.png

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      • DustinB3403D
        DustinB3403 @scottalanmiller
        last edited by

        @scottalanmiller said:

        @DustinB3403 said:

        Can't find

            md0 in /etc/fstab or /etc/mtab
        

        Should not be there, right?

        I added an entry into fstab. It may have a typo...

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        • DustinB3403D
          DustinB3403
          last edited by

          fstab

          0_1447093339301_2015-11-09_13-22-06.png

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          • DustinB3403D
            DustinB3403
            last edited by

            fstab corrected, entry reversed.

                 mount raid10
            mount: /mnt/raid10 is not a block device
            
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            • RomoR
              Romo
              last edited by

              Your could run

              mdadm --examine --scan >> /etc/mdadm/mdadm.conf

              To recreate the conf and see if it fixes the problem. /dev/md/0 should be a symbolic link to /dev/md0

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

                @Romo Same response when reexamining the disks. this is for both

                mount /mnt/raid10 && mount /dev/md10
                

                0_1447093679739_2015-11-09_13-27-40.png

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                • dafyreD
                  dafyre
                  last edited by

                  mount /dev/md0 /mnt/raid10 ?

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                  • scottalanmillerS
                    scottalanmiller
                    last edited by

                    /dev/md0 not md10

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                    • scottalanmillerS
                      scottalanmiller
                      last edited by

                      Using RAID 10 in names anywhere is very confusing and hard to read. I think several of these issues are partially stemming just from poor naming conventions. Name mount points by purpose, not technology.

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                      • RomoR
                        Romo
                        last edited by

                        You can't mount /dev/md0, because according to the mdadm --examine --scan ouput, the array, is at /dev/md/0

                        StrongBadS 1 Reply Last reply Reply Quote 0
                        • StrongBadS
                          StrongBad @Romo
                          last edited by

                          @Romo said:

                          You can't mount /dev/md0, because according to the mdadm --examine --scan ouput, the array, is at /dev/md/0

                          Good eye, that was hard to see.

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                          • RomoR
                            Romo
                            last edited by

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

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                            • 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)

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                                      • 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.

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                                        • 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]#
                                            
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