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NetWorker 19.7 Snapshot Management Integration Guide

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Snapshot backup on Unity fails

When you perform a snapshot backup with Unity 4.2 or 4.1, the backup fails, and displays the following error: 

"Internal Error: Failed to get status of import operation."

Workaround

When you configure Unity 4.2 or 4.1 LUN's, you must add snapshot access for the new LUN through UEMCLI. Use the format below:

uemcli -d <unity array ip> -u <user name> -p <password> /stor/prov/luns/lun -id <lun id> set -snapHosts <host id>

where Lun ID and Host ID can be retried from the Block and Hosts pages in Unisphere.

When you perform a snapshot backup with Unity 5.1 or 5.2, the backup fails, and displays the following error: 

"Internal Error: Failed to get status of import operation."

Workaround

Ensure that you meet the following Unity requirements to perform backups:

On the physical host
  • You set the NetWorker Module Snapshot Management as the snapshot access host for all source LUNs, and ensure that all the source LUNs have only one snapshot access.

    The Unity GUI provides an option to create a snapshot for a LUN and associate the NetWorker Module for SNAPSHOT MANAGEMENT host to it.

    If the Unity GUI does not provide the option, run the following command:

    uemcli -d <Unity_IP_address> -u <Username> -p <Password> /stor/prov/luns/lun -id <Source_LUN_ID> set -snapHosts <NetWorker_Module_for_Snapshot_Managemet_Host_ID>

  • On the NetWorker Module for Snapshot Management , you configured the Unisphere CLI:

    In the Configure Optional Settings panel of UEMCLI:

    1. Select the Unisphere CLI in the Environment path option.

      By default, the option is selected.

    2. Select the Low (The certificate will not be verified) option to avoid runtime backup errors.
  • You created the security file on the proxy host as the Windows SYSTEM user to perform backups by using the NMC:
    1. Create a user account, for example, backup or nmmedi on Unity to perform backups.
    2. Download the PSEXEC.exe file from the Microsoft website.
    3. In the path environment variable, specify the path to the PSEXEC.exe file.
    4. Run the following command from the command prompt:

      PSEXEC  -i  -s –d CMD

      The command starts the SYSTEM command prompt.

      NOTE If the PSEXEC command does not start the SYSTEM command prompt, run the PSEXEC command from Windows Start > Run....
    5. Run the following command to verify whether the command prompt belongs to the SYSTEM user account:

      WHOAMI/USER

    6. In the SYSTEM command prompt, run the following command:

      uemcli -d <Unity_IP_Address> -u <Unity_Username> -p <Unity_Password> -saveUser

      Use the username and the password of the account that you created on Unity in step 1.

      The command creates the security file.

    7. Run the following command to verify whether you created the security file:

      uemcli -d <Unity_IP_Address> /prot/snap show

      The Unity information appears which indicates that the procedure has created the security file. If an error appears, UEMCLI is not correctly set up.

    NOTE You must create the security file as the administrator user to perform backups by using the CLI.
  • You specified the Windows registry setting for the UEMCLI system path.

    To ensure that you have a valid path to the Unisphere installation location, manually add a registry entry for NetWorker:

    1. From the command prompt or the Windows shell prompt, type regedit.
    2. Go to the HKEY_LOCAL_MACHINE\SOFTWARE\Legato\NetWorker folder.
    3. Right-click and select New > String Value.
    4. Type UEMCLI_directory as the value, and press Enter on the keyboard.
    5. Right-click UEMCLI_directory, and select Modify.
    6. In the Value data field, type the full path to the Unisphere CLI installation location.

On a virtual machine

If you installed the NetWorker Module for Snapshot Management on a virtual machine, you performed the following steps:
  • You set the ESXi host as the snapshot access host for all source LUNs, and ensure that all the source LUNs have only one snapshot access.

    The Unity (Unisphere) GUI provides an option to create a snapshot for a LUN and associate the ESXi host to it.

    If the Unity GUI does not provide the option, run the following command:

    uemcli -d <Unity_IP_address> -u <Username> -p <Password> /stor/prov/luns/lun -id <Source_LUN_ID> set -snapHosts <ESXi_Host_ID>

  • After the snapshot access creation on the ESXi server, create an RDM of the LUNs to the virtual machine.
  • In the Unity GUI, in the Add a Host wizard, add the NetWorker Module for Snapshot Management as the host.

    The hostname that you specify must be the exact hostname of the NetWorker Module for Snapshot Management.

    In the wizard, leave the other settings or fields as they are.

  • On the NetWorker Module for Snapshot Management, you configured the Unisphere CLI:

    In the Configure Optional Settings panel of UEMCLI:

    1. Select the Unisphere CLI in the Environment path option.

      By default, the option is selected.

    2. Select the Low (The certificate will not be verified) option to avoid runtime backup errors.
  • You created the security file on the proxy host as the Windows SYSTEM user to perform backups by using the NMC:
    1. Create a user account, for example, backup on Unity to perform backups.
    2. Download the PSEXEC.exe file from the Microsoft website.
    3. In the path environment variable, specify the path to the PSEXEC.exe file.
    4. Run the following command from the command prompt:

      PSEXEC  -i  -s –d CMD

      The command starts the SYSTEM command prompt.

      NOTE If the PSEXEC command does not start the SYSTEM command prompt, run the PSEXEC command from Windows Start > Run....

    5. Run the following command to verify whether the command prompt belongs to the SYSTEM user account:

      WHOAMI/USER

    6. In the SYSTEM command prompt, run the following command:

      uemcli -d <Unity_IP_Address> -u <Unity_Username> -p <Unity_Password> -saveUser

      Use the username and the password of the account that you created on Unity in step 1.

      The command creates the security file.

    7. Run the following command to verify whether you created the security file:

      uemcli -d <Unity_IP_Address> /prot/snap show

      The Unity information appears which indicates that the procedure has created the security file. If an error appears, UEMCLI is not correctly set up.

    NOTE You must create the security file as the administrator user to perform backups by using the CLI.
  • You specified the Windows registry setting for the UEMCLI system path.

    To ensure that you have a valid path to the Unisphere installation location, manually add a registry entry for NetWorker:

    1. From the command prompt or the Windows shell prompt, type regedit.
    2. Go to the HKEY_LOCAL_MACHINE\SOFTWARE\Legato\NetWorker folder.
    3. Right-click and select New > String Value.
    4. Type UEMCLI_directory as the value, and press Enter on the keyboard.
    5. Right-click UEMCLI_directory, and select Modify.
    6. In the Value data field, type the full path to the Unisphere CLI installation location.

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