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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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    • scottalanmillerS
      scottalanmiller
      last edited by

      You CAN run in RAM. But why? If anything happens the logs vanish. And it uses up memory too, but not normally all that much. But will you have it auto-rotate in some way?

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

        Completing the Resync process takes a very long time.....

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

          It'll do that 🙂

          1 Reply Last reply Reply Quote 0
          • stacksofplatesS
            stacksofplates @scottalanmiller
            last edited by

            @scottalanmiller said:

            You CAN run in RAM. But why? If anything happens the logs vanish. And it uses up memory too, but not normally all that much. But will you have it auto-rotate in some way?

            I was just wondering if it's possible to do it similarly to VMware. It was more of just a question for questions sake. XenServer already takes up a gig of ram so the rest couldn't be that much. And you could send the logs somewhere else like you mentioned. It was more of just a question to see if it was possible.

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

              You can always create a ram disk and put anything there that you want.

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

                Just did a reboot on my test system, and the RAID Array is unmounted. Meaning we need to add it to fstab.

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

                  I reboot without a problem, and the mounting of the array is managed properly by xen without the entry in fstab.

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

                    On the test setup I built using the OP, the array is lost.

                    Along with everything on it. It's much safer to keep it stored in fstab..

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

                      Lost the whole array? That's strange that would imply something went really wrong. The entry added in fstab whould only cause the os to automount the array, nothing there should cause the array itself to get wiped.

                      What is the current status of your array?
                      mdadm --detail /dev/md0
                      cat /proc/mdstat

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                      • DustinB3403D
                        DustinB3403
                        last edited by

                        This is what is in /var/run/sr-mount....

                        0_1447077315730_2015-11-09_08-54-47.png

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                        • DustinB3403D
                          DustinB3403
                          last edited by

                          This is mdadm --details

                          0_1447077386678_2015-11-09_08-56-05.png

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                          • DustinB3403D
                            DustinB3403
                            last edited by DustinB3403

                            and cat /proc/mdstat

                            0_1447077445996_2015-11-09_08-56-57.png

                            scottalanmillerS RomoR 2 Replies Last reply Reply Quote 0
                            • scottalanmillerS
                              scottalanmiller @DustinB3403
                              last edited by

                              @DustinB3403 said:

                              and cat /proc/mdstat

                              ![0_1447077435496_2015-11-09_08-56-57.png](Uploading 100%)

                              patience.....

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

                                Yes Yes, you're too quick some times sir. I corrected it.

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                                • DustinB3403D
                                  DustinB3403
                                  last edited by

                                  So with the above 3 pictures and the Array missing.

                                  I'd obviously have to rebuild the array, and remap items. Additionally, I'll have to recreate my "backup" USB (which isn't a huge deal)

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

                                    @DustinB3403 can you run

                                    mdadm --examine --scan

                                    1 Reply Last reply Reply Quote 2
                                    • scottalanmillerS
                                      scottalanmiller
                                      last edited by

                                      We need to find the missing array before we can do anything else. As @romo mentioned we need to scan and see if the array is out there somewhere.

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

                                        0_1447092654693_2015-11-09_13-10-40.png

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

                                          Running

                                              mount md0
                                          

                                          results in

                                             mount: mount point /mnt/raid10 does not exist
                                          
                                          1 Reply Last reply Reply Quote 0
                                          • scottalanmillerS
                                            scottalanmiller
                                            last edited by

                                            mkdir /mnt/raid10

                                            1 Reply Last reply Reply Quote 0
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