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Activating the disaster recovery vFiler unit

After a disaster, you can keep serving data by switching to the disaster recovery vFiler unit while trying to recover the original vFiler unit that was damaged during the disaster.


  1. On the destination storage system, enter the following command:
    vfiler dr activate source_vfiler@source_filer
  2. Configure the DNS or NIS servers:
    If you specified... Then...
    A different set of DNS or NIS servers Copy the /etc/hosts.equiv.bak file to the /etc/hosts.equiv file.
    The same set of DNS or NIS servers Go to Step 3.

    When you activate the vFiler unit in the event of a disaster, the /etc/hosts.equiv file can be overwritten. If you specified a different set of DNS or NIS servers for the disaster recovery location when you created the disaster recovery vFiler unit, the existing /etc/hosts.equiv file is overwritten and the old file is copied to an /etc/hosts.equiv.bak file.

  3. To change the name of the Windows domain controller, use the cifs prefdc command.
  4. To change the Windows WINS server, use the cifs setup command.

    Note: If the Windows domain has changed, you might have to change the permissions on the Windows data files to allow your users the same access they had in the old domain.

  5. Make adjustments on the clients, such as remounting volumes and qtrees.
  6. Add static route entry if required, because static routing information is not carried to the destination storage system.

After you finish

  • If you copied quota information to the destination storage system’s /etc/quotas file, activate the quotas on that storage system. For activating quota on each volume, use the following command:
    quota on volume_name
  • Edit the disaster recovery vFiler unit’s /etc/hosts.equiv file by adding the name of the trusted host for administering the disaster recovery vFiler unit.
    Note: If the trusted host is either a Windows or a UNIX system and the trusted user is not the root user, you need to add the user name as well. For example:
    adminhost joe_smith
  • Add the path to the root volume and the name of the trusted host to the disaster recovery vFiler unit’s /etc/exports file.
    /vol/vf1_root access=adminhost, root=adminhost
  • If the vFiler unit’s storage units contain iSCSI LUNs, reconfigure iSCSI authentication.

    For instructions, see the Data ONTAP SAN Administration Guide for 7-Mode.