Configuring a new disk group as a Remote Mirror configuration

Note:

The Remote Mirror feature requires that a license enabling the Site Awareness feature has been installed on all hosts at all sites that participate in the configuration.

This section describes setting up a new disk group. To configure an existing disk group as a Remote Mirror configuration, additional steps may be required.

Setting up a new disk group for a Remote Mirror configuration

  1. Define the site name for each host that can access the disk group.

    # vxdctl set site=sitename

    The name that has been assigned to a site is stored in the /etc/vx/volboot file.

  2. Create the disk group with storage from each site.

  3. Register a site record to the disk group, for each site.

    # vxdg -g diskgroup [-f] addsite sitename
  4. Do one of the following:

    • To tag all disks regardless of the disk group, do the following:

      Assign a site name to the disks or enclosures. You can set site tags at the disk level, or at the enclosure level. If you specify one or more enclosures, the site tag applies to the disks in that enclosure that are within the disk group. Enter the following command:

      # vxdisk [-g diskgroup] settag site=sitename \
        disk disk1... |encl:encl_name encl:encl_name1...

      where the disks can be specified either by the disk access name or the disk media name.

    • To autotag new disks added to the disk group based on the enclosure to which they belong, perform the following steps in the order presented. These steps are limited to disks in a single group.

      • Set the autotagging policy to on for the disk group, if required. Automatic tagging is the default setting, so this step is only required if the autotagging policy was previously disabled. To turn on autotagging, enter the following command:

        # vxdg [-g diskgroup] set autotagging=on
      • Add site-enclosure mapping information to the diskgroup for each site-enclosure combination. Enter the following command:

        # vxdg [-g diskgroup] settag encl:encl_name1 site=sitename1

        As a result of this command, all disks of enclosure encl_name1 in the specified disk group are tagged with site information.

  5. Turn on the site consistency requirement for a disk group:

    # vxdg -g diskgroup set siteconsistent=on