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    SR usage on multiple pools

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    • Tristis OrisT Offline
      Tristis Oris Top contributor
      last edited by

      i'm upgrade pool to 8.3 with clean install, reattach old SR so it connected to 2 pools at same time. But i can't use anywhere.
      Is it intended?

      94520411-6a9c-4916-9930-9a6f3f88deea-image.png

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      • olivierlambertO Offline
        olivierlambert Vates 🪐 Co-Founder CEO
        last edited by

        A SR cannot be attached to multiple pools at once.

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        • Tristis OrisT Offline
          Tristis Oris Top contributor @olivierlambert
          last edited by

          @olivierlambert but it attached) bug here?

          ed571e90-2751-4795-bf12-f190f9ef4b3b-image.png

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          • olivierlambertO Offline
            olivierlambert Vates 🪐 Co-Founder CEO
            last edited by

            If you plug a block device on another pool it will lead to corruption because one pool cannot know where the other pool is having host writing to which VM disk.

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            • Tristis OrisT Offline
              Tristis Oris Top contributor @olivierlambert
              last edited by

              @olivierlambert need to block plug operations then.

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              • Tristis OrisT Offline
                Tristis Oris Top contributor
                last edited by

                yep. VM i migrated from old SR now won't start. Looks VDI's was totaly corrupted at moment of connection.

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                • Tristis OrisT Offline
                  Tristis Oris Top contributor @olivierlambert
                  last edited by

                  @olivierlambert nvm restored it by somehow.

                  Double mount not a problem for NFS storage?

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                  • DanpD Offline
                    Danp Pro Support Team @Tristis Oris
                    last edited by

                    @Tristis-Oris said in SR usage on multiple pools:

                    Double mount not a problem for NFS storage?

                    You can create an NFS SR on each pool using the same destination device / path. It will create a unique subdirectory for each pool, so no issues with corruption because each pool has its own unique SR.

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                    • Tristis OrisT Offline
                      Tristis Oris Top contributor @Danp
                      last edited by

                      @Danp so i need to migrate VDIs anyway? inside same SR but to another dirrectory.

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                      • DanpD Offline
                        Danp Pro Support Team @Tristis Oris
                        last edited by

                        @Tristis-Oris Yes, but it isn't the same SR. It is multiple SRs, each in their own subdirectory.

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                        • Tristis OrisT Offline
                          Tristis Oris Top contributor @Danp
                          last edited by

                          @Danp yes got it. i'm about physical layer. thanks.

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                          • olivierlambertO Offline
                            olivierlambert Vates 🪐 Co-Founder CEO
                            last edited by

                            Yes, it's a "definition" question/problem: a SR is the exact place where you store your virtual disk images. On NFS, it's a folder named after the UUID of the SR. As Dan said, if you connect to the same NFS folder, it will create a new folder for each new SR inside. So even if it's the same physical device/NFS share, there's many SRs on it.

                            For a block based SR, it's different: if you pass a LUN (in ISCSI for example), it will attach it and warn you: either you want to re-attach the previously existing SR (UUID etc) either you erase it completely to start from scratch. There's no "folders" on a block space like a LUN, so it's different.

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