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    Adding new Local Storage to XenServer.

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    • AjinA
      Ajin
      last edited by

      Hi Team,

      Back in Mangolassi after some time 🙂

      This time i have come with something related to Xen Server.

      I have a xen server with 2 TB HDD. (Default Local disk)

      Inside the XenServer Host i have a developement server which occupies 1.6 TB space .

      My problem is that i cannot take a snapshot of the Developent server because of its space , 2 TB Disk is already occupied with 1.6 TB server files !

      Error displayed : The specified storage space have insufficient space.

      Now i have added a 3 TB HDD as a second Local disk (Local disk 2) by thinking that the extra space will solve my issue , But still the same issue continues.

      (Image attached : Local storage is the default storage and local storage 2 LACIE HDD is the newly added one .)

      The tick mark in the Local Storage makes it as the default storage repository . If i make the Newly added Local storage as default i wont be able to access current server i guess.

      0_1468319964781_22.JPG

      Is there any way to configure in such a way that the snapshots can be taken to the New Local disk i have added.

      scottalanmillerS 1 Reply Last reply Reply Quote 2
      • DustinB3403D
        DustinB3403
        last edited by

        The Lacie drive is not at all local to the server. It's attached storage and therefore not available to be used as "snapshot" storage. If you wanted to use the Lacie as a place to store your actual backups (snapshots are not backups) you could do that.

        But using the snapshot functionality, you need space on the disk that is housing the VM.

        scottalanmillerS 1 Reply Last reply Reply Quote 1
        • AjinA
          Ajin
          last edited by

          Thanks for the reply Dustin.

          My actual need is to take a snapshot of the Development server before making any vital changes in the server , so that i can revert safely if any thing goes wrong , as reverting snapshot will take very little time and easy to perform.

          DustinB3403D 1 Reply Last reply Reply Quote 0
          • dafyreD
            dafyre
            last edited by

            The 2TB drive that you are speaking of... Is that an INTERNAL drive, or is it an External drive?

            I see that LaCie and the first thing that went through my mind is it is an external drive.

            1 Reply Last reply Reply Quote 0
            • AjinA
              Ajin
              last edited by Ajin

              IT an External drive , which i have added to Xenserver with the following command .

              xe sr-create name-label="Local Storege 2 LACIE HDD" shared=false device-config:device=/dev/sdc type=lvm

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

                @Ajin said in Adding new Local Storage to XenServer.:

                Thanks for the reply Dustin.

                My actual need is to take a snapshot of the Development server before making any vital changes in the server , so that i can revert safely if any thing goes wrong , as reverting snapshot will take very little time and easy to perform.

                A snapshot can only work if it's on the same drive in which the VM resides. This LACIE drive is external, the only choice you have with this is to create a full backup to this drive and hope for the best. (that whatever changes you have works and that you don't need to revert)

                scottalanmillerS 1 Reply Last reply Reply Quote 2
                • dafyreD
                  dafyre @Ajin
                  last edited by

                  @Ajin said in Adding new Local Storage to XenServer.:

                  IT an External drive , which i have added to Xenserver with the following command .

                  xe sr-create name-label="Local Storege 2 LACIE HDD" shared=false device-config:device=/dev/sdc type=lvm

                  Does your VM actually run from that LaCie drive, or does it run from internal drives on your server?

                  1 Reply Last reply Reply Quote 0
                  • AjinA
                    Ajin
                    last edited by

                    The VM is running from internal drive in my server.

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

                      @Ajin Welcome back

                      1 Reply Last reply Reply Quote 0
                      • scottalanmillerS
                        scottalanmiller @DustinB3403
                        last edited by

                        @DustinB3403 said in Adding new Local Storage to XenServer.:

                        The Lacie drive is not at all local to the server. It's attached storage and therefore not available to be used as "snapshot" storage. If you wanted to use the Lacie as a place to store your actual backups (snapshots are not backups) you could do that.

                        But using the snapshot functionality, you need space on the disk that is housing the VM.

                        It is as local to the server as anything else is. It's a DAS unit and therefore identical to the server as if it were inside the chassis.

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

                          @DustinB3403 said in Adding new Local Storage to XenServer.:

                          @Ajin said in Adding new Local Storage to XenServer.:

                          Thanks for the reply Dustin.

                          My actual need is to take a snapshot of the Development server before making any vital changes in the server , so that i can revert safely if any thing goes wrong , as reverting snapshot will take very little time and easy to perform.

                          A snapshot can only work if it's on the same drive in which the VM resides. This LACIE drive is external, the only choice you have with this is to create a full backup to this drive and hope for the best. (that whatever changes you have works and that you don't need to revert)

                          This is the important part. Not that the Lacie is internal or not, but that it needs to be the same block device as the server for snapshots to be able to snap initially.

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

                            @scottalanmiller said in Adding new Local Storage to XenServer.:

                            @DustinB3403 said in Adding new Local Storage to XenServer.:

                            The Lacie drive is not at all local to the server. It's attached storage and therefore not available to be used as "snapshot" storage. If you wanted to use the Lacie as a place to store your actual backups (snapshots are not backups) you could do that.

                            But using the snapshot functionality, you need space on the disk that is housing the VM.

                            It is as local to the server as anything else is. It's a DAS unit and therefore identical to the server as if it were inside the chassis.

                            I'll disagree to this with regards that it's not the same block device. Therefor it's "external" as far as the system cares to use it for this case.

                            scottalanmillerS 1 Reply Last reply Reply Quote 0
                            • scottalanmillerS
                              scottalanmiller @DustinB3403
                              last edited by

                              @DustinB3403 said in Adding new Local Storage to XenServer.:

                              @scottalanmiller said in Adding new Local Storage to XenServer.:

                              @DustinB3403 said in Adding new Local Storage to XenServer.:

                              The Lacie drive is not at all local to the server. It's attached storage and therefore not available to be used as "snapshot" storage. If you wanted to use the Lacie as a place to store your actual backups (snapshots are not backups) you could do that.

                              But using the snapshot functionality, you need space on the disk that is housing the VM.

                              It is as local to the server as anything else is. It's a DAS unit and therefore identical to the server as if it were inside the chassis.

                              I'll disagree to this with regards that it's not the same block device. Therefor it's "external" as far as the system cares to use it for this case.

                              That cannot be correct simply because you can have thousands of totally different block devices all equally local and internal to the chassis. One is not more internal or local than the other. I have two totally independent block devices on the latest VM that I built. They are totally unrelated to each other, but both are equally local.

                              Two different block devices can even come from the same physical drive!

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

                                @scottalanmiller said in Adding new Local Storage to XenServer.:

                                @DustinB3403 said in Adding new Local Storage to XenServer.:

                                @scottalanmiller said in Adding new Local Storage to XenServer.:

                                @DustinB3403 said in Adding new Local Storage to XenServer.:

                                The Lacie drive is not at all local to the server. It's attached storage and therefore not available to be used as "snapshot" storage. If you wanted to use the Lacie as a place to store your actual backups (snapshots are not backups) you could do that.

                                But using the snapshot functionality, you need space on the disk that is housing the VM.

                                It is as local to the server as anything else is. It's a DAS unit and therefore identical to the server as if it were inside the chassis.

                                I'll disagree to this with regards that it's not the same block device. Therefor it's "external" as far as the system cares to use it for this case.

                                That cannot be correct simply because you can have thousands of totally different block devices all equally local and internal to the chassis. One is not more internal or local than the other. I have two totally independent block devices on the latest VM that I built. They are totally unrelated to each other, but both are equally local.

                                Two different block devices can even come from the same physical drive!

                                My point is, for the use of Snapshot it's a different block device, external to the one in which the VM lives. It can't be used to create snapshots.

                                1 Reply Last reply Reply Quote 0
                                • AjinA
                                  Ajin
                                  last edited by

                                  @scottalanmiller Thankyou .

                                  I was just testing moving the VM to the new storage , moved the VM to the new storage , changed the mac id and it works good , Now i can take snap since the vm resides in the new storage with enough space for snapshot

                                  scottalanmillerS BRRABillB 2 Replies Last reply Reply Quote 4
                                  • scottalanmillerS
                                    scottalanmiller @Ajin
                                    last edited by

                                    @Ajin said in Adding new Local Storage to XenServer.:

                                    @scottalanmiller Thankyou .

                                    I was just testing moving the VM to the new storage , moved the VM to the new storage , changed the mac id and it works good , Now i can take snap since the vm resides in the new storage with enough space for snapshot

                                    Great!

                                    1 Reply Last reply Reply Quote 0
                                    • AjinA
                                      Ajin
                                      last edited by

                                      Thank-you all for the valuble suggetions 🙂

                                      1 Reply Last reply Reply Quote 1
                                      • BRRABillB
                                        BRRABill @Ajin
                                        last edited by

                                        @Ajin said

                                        I was just testing moving the VM to the new storage , moved the VM to the new storage , changed the mac id and it works good , Now i can take snap since the vm resides in the new storage with enough space for snapshot

                                        It's awesome when it works like that, right?

                                        1 Reply Last reply Reply Quote 1
                                        • AjinA
                                          Ajin
                                          last edited by

                                          Yes It is 🙂

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

                                            Another ML success story 🙂

                                            1 Reply Last reply Reply Quote 1
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