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    Building Out XenServer 6.5 with USB Boot and Software RAID 10

    IT Discussion
    xen virtualization xenserver xenserver 6.5 how to
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    • R
      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.

      D 1 Reply Last reply Reply Quote 0
      • D
        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
        • R
          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
          • R
            Romo
            last edited by

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

            1 Reply Last reply Reply Quote 0
            • D
              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
              • R
                Romo
                last edited by

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

                D 1 Reply Last reply Reply Quote 0
                • D
                  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
                  • D
                    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
                    
                    R 1 Reply Last reply Reply Quote 0
                    • R
                      Romo
                      last edited by

                      Does xencenter see the storage?

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

                        Yes, the Local OBR10 is back on XenCenter.

                        1 Reply Last reply Reply Quote 0
                        • R
                          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

                          D 1 Reply Last reply Reply Quote 0
                          • D
                            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.

                            R 1 Reply Last reply Reply Quote 0
                            • R
                              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
                              • A
                                Alex Sage
                                last edited by Alex Sage

                                This post is deleted!
                                1 Reply Last reply Reply Quote 0
                                • A
                                  Alex Sage
                                  last edited by Alex Sage

                                  This post is deleted!
                                  1 Reply Last reply Reply Quote 0
                                  • A
                                    Alex Sage
                                    last edited by

                                    Looks good?

                                    [root@XenServer ~]# cat /proc/mdstat
                                    Personalities : [raid10] [raid1]
                                    md0 : active raid1 sdb[0] sdc[1]
                                          976631360 blocks super 1.2 [2/2] [UU]
                                          [=>...................]  resync =  5.4% (52749312/976631360) finish=143.3min speed=107400K/sec
                                    
                                    unused devices: <none>
                                    [root@XenServer ~]#
                                    
                                    D 1 Reply Last reply Reply Quote 1
                                    • D
                                      DustinB3403 @Alex Sage
                                      last edited by

                                      @anonymous besides just the two disk, yeah it looks alright.

                                      1 Reply Last reply Reply Quote 0
                                      • scottalanmillerS
                                        scottalanmiller
                                        last edited by

                                        Nothing wrong with RAID 1!

                                        1 Reply Last reply Reply Quote 1
                                        • A
                                          Alex Sage
                                          last edited by

                                          Will this guide work with CentOS 7?

                                          D scottalanmillerS 2 Replies Last reply Reply Quote 0
                                          • D
                                            DustinB3403 @Alex Sage
                                            last edited by

                                            @aaronstuder said:

                                            Will this guide work with CentOS 7?

                                            It likely would, but you'll have to test it to find out.

                                            1 Reply Last reply Reply Quote 0
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