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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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    • S
      scottalanmiller
      last edited by

      We need to get the UUID out of the proposed script, that much I know won't work.

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      • S
        scottalanmiller @Romo
        last edited by

        @Romo said:

        I removed the /dev/md10 entry from fstab so it doesn't automount and causes conflict with xenserver handling storage

        Ah, good catch. I'm updating the OP with a finalized script. Please review.

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        • R
          Romo
          last edited by

          I got the uuid using this:

          madadm --detail /dev/md10 | grep UUID

          S 2 Replies Last reply Reply Quote 2
          • R
            Romo
            last edited by

            We don't need to install mdadm, its there already

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            • S
              scottalanmiller @Romo
              last edited by

              @Romo said:

              I got the uuid using this:

              madadm --detail /dev/md10 | grep UUID

              Thanks.

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              • S
                scottalanmiller @Romo
                last edited by

                @Romo said:

                I got the uuid using this:

                madadm --detail /dev/md10 | grep UUID

                What is the raw output of that command? Did you need to clean it up? I want this scripted, not manual, if possible.

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                • B
                  brianlittlejohn
                  last edited by

                  i'm going to have to try this out, i have an old dell with FAKERAID.

                  M 1 Reply Last reply Reply Quote 1
                  • R
                    Romo
                    last edited by

                    This is the output @scottalanmiller just have to replace : with -

                    UUID : fba59a9c:7e6db5a2:d21e4034:3b415cfd

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                    • M
                      mlnews @brianlittlejohn
                      last edited by

                      @brianlittlejohn said:

                      i'm going to have to try this out, i have an old dell with FAKERAID.

                      You can do it anywhere. No FakeRAID needed since the whole point is to bypass it. Works equally well where there is no FakeRAID too.

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

                        echo "modprobe raid10" > /etc/sysconfig/modules/raid.modules
                        modprobe raid10
                        chmod a+x /etc/sysconfig/modules/raid.modules

                        mdadm --create /dev/md0 --level=10 --raid-devices=4 /dev/sd[a-d]

                        Loading the modules to kernel need to go before creating the md device

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                        • S
                          scottalanmiller
                          last edited by

                          @romo can you confirm if this command works?

                          madadm --detail /dev/md10 | grep UUID | cut -d' ' -f3
                          
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                          • R
                            Romo
                            last edited by

                            I got a blank output after fixing madadm to mdadm

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                            • S
                              scottalanmiller
                              last edited by

                              It worked on the output that you gave to me. 😞

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                              • S
                                scottalanmiller
                                last edited by

                                See what -f2 does.

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                                • S
                                  scottalanmiller
                                  last edited by

                                  I refreshed the OP with the latest revisions.

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                                  • R
                                    Romo
                                    last edited by

                                    Screenshot from 2015-11-05 09:47:36.png

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                                    • D
                                      DustinB3403
                                      last edited by

                                      Romo can you confirm if SDA is the USB drive?

                                      we need to confirm that it's not attempting to be added to the Array with

                                      mdadm --create /dev/md0 --level=10 --raid-devices=4 /dev/sd[a-d]
                                      
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                                      • R
                                        Romo
                                        last edited by

                                        Yes in my setup sda simulates to be the usb, thats why the array starts with sdb

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                                        • D
                                          DustinB3403
                                          last edited by

                                          OK so scott change the script to start at sd[b-e]

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                                          • R
                                            Romo
                                            last edited by

                                            I believe it should be in this order:

                                            modprobe raid10
                                            chmod a+x /etc/sysconfig/modules/raid.modules
                                            mdadm --create /dev/md0 --level=10 --raid-devices=4 /dev/sd[a-d]
                                            cat /proc/mdstat

                                            D 1 Reply Last reply Reply Quote 0
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