Topic
9 replies Latest Post - ‏2012-10-26T08:32:52Z by PontiacGeronimo
karthikraja
karthikraja
22 Posts
ACCEPTED ANSWER

Pinned topic alt_disk_copy for VIOS

‏2011-08-02T10:17:08Z |
Dear All,

Am planning to clone the root vg (alt_disk_copy) to different disk, my query is will it work for VIO servers ? if so , can we use the target disk to boot ?

Thanks,
Karthi
Updated on 2012-10-26T08:32:52Z at 2012-10-26T08:32:52Z by PontiacGeronimo
  • SystemAdmin
    SystemAdmin
    6908 Posts
    ACCEPTED ANSWER

    Re: alt_disk_copy for VIOS

    ‏2011-08-07T19:58:42Z  in response to karthikraja
    Yes. It will work for the VIOS. You can run it from the root prompt. Once the alternate disk copy process completes, By default the first boot device will be the disk which you have mentioned on the alt_disk_copy -d <hdisk#> command.
    1. Kannan.
    • karthikraja
      karthikraja
      22 Posts
      ACCEPTED ANSWER

      Re: alt_disk_copy for VIOS

      ‏2011-08-08T11:13:34Z  in response to SystemAdmin
      Hi Kannan,

      Thanks for the info, have you tried to boot form the Cloned Disk and able to see all mappings ?

      Thanks,
      Karthik
      • SystemAdmin
        SystemAdmin
        6908 Posts
        ACCEPTED ANSWER

        Re: alt_disk_copy for VIOS

        ‏2011-08-08T21:08:33Z  in response to karthikraja
        The command from ioscli is alt_root_vg but it does not have -X option (clean the alt_disk_install) and you run this from root shell.
        • SystemAdmin
          SystemAdmin
          6908 Posts
          ACCEPTED ANSWER

          Re: alt_disk_copy for VIOS

          ‏2011-08-08T21:53:25Z  in response to SystemAdmin
          Yes, If you boot the VIOS on the cloned disk, It should come up properly with all the configuration.

          I have done this test, while I have performed the VIOS upgrade.
            1. Kannan
          • SystemAdmin
            SystemAdmin
            6908 Posts
            ACCEPTED ANSWER

            Re: alt_disk_copy for VIOS

            ‏2011-08-08T21:55:36Z  in response to SystemAdmin
            Kerthi,

            Are you facing any issues, If you boot the VIOS on the cloned disk ?
            Kannan
            • karthikraja
              karthikraja
              22 Posts
              ACCEPTED ANSWER

              Re: alt_disk_copy for VIOS

              ‏2011-08-09T13:46:38Z  in response to SystemAdmin
              Kannan,

              No, Thanks for the info.

              Thanks,
              Karthik
              • SystemAdmin
                SystemAdmin
                6908 Posts
                ACCEPTED ANSWER

                Re: alt_disk_copy for VIOS

                ‏2012-10-24T04:04:43Z  in response to karthikraja
                This works good but I have one doubt. alt_disk_copy does not back-up unmounted FS. If I have an LV mapped to VIO client as vscsi disk, alt_disk_copy will take it as unmounted FS and will not backup ( though LV should be created ) and then if VIO is booted from alt_rootvg, the VIO client will not have data in that LV mapped disk.

                Have you tried this?
                • teletype
                  teletype
                  27 Posts
                  ACCEPTED ANSWER

                  Re: alt_disk_copy for VIOS

                  ‏2012-10-25T17:59:01Z  in response to SystemAdmin
                  Hey Amit,
                  Maybe I am missing the point here. But for a vio server the logical volume does not contain a filesystem so it would be impossible to backup/restore it. This is, to the best of my knowledge, what alt_disk_copy does.
                  Furthermore I hope you did not make the logical volumes in rootvg but used another volumegroup for it. If you did, then you are in trouble if you use alt_disk_copy.

                  Hope this helps
                  • PontiacGeronimo
                    PontiacGeronimo
                    75 Posts
                    ACCEPTED ANSWER

                    Re: alt_disk_copy for VIOS

                    ‏2012-10-26T08:32:52Z  in response to teletype
                    i think you could wake alt_rootvg up and do copy the lv using dd or cplv --- I have using dd many times clonning LV backend devices and it worked.
                    of coure better is to stop client fisrt or assing to the client another disks"LV" from non-rootvg and migrate it to it (via mklvcopy or mirrorvg).