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StarWind iSCSI SAN & NAS: Multipathing

Published: October 25, 2012

StarWind iSCSI SAN & NAS: Multipathing

INTRODUCTION

The diagram below illustrates the network architecture used in this document.

StarWind iSCSI SAN & NAS: Multipathing

CONFIGURING STARWIND SERVER

1. Open a StarWind configuration file.

Note: The default path is C:\Program Files\StarWind Software\StarWind\StarWind.cfg

2. Find the string “<!–<iScsiDiscoveryListInterfaces value=”1″/>–>” and uncomment it (should look as follows: <iScsiDiscoveryListInterfaces value=”1″/>).

3. Restart StarWind Service.

4. Launch StarWind Management Console: Start -> All Programs -> StarWind Software -> StarWind.

Note: The StarWind Console icon appears in the system tray when the Console is running. To open StarWind Management Console, double-click the icon or right-click it and then select Start Management Console from the shortcut menu.

5. Select the server you want to provide with the iSCSI target device from the Console tree. Double-click the host to connect.

Note: If you are prompted to enter login and password, specify “root” and “starwind”, relatively. These are the default login and password, but you can always change them later.

6. After connecting to StarWind Service, you can create devices and targets on the server. Open Add Device Wizard by one of the following ways:

• Select Add Device from the Target menu.
• Select Add Device from the Devices shortcut menu (right-click to open it).

7. Add Device Wizard appears. Please, follow the wizard’s steps to complete creation of a new image file device.

8. Select Virtual Hard Disk -> Image File device.

StarWind iSCSI SAN & NAS: Multipathing

9. Click Next to continue.

10. Select the Create new virtual disk option.

StarWind iSCSI SAN & NAS: Multipathing

11. Click Next to continue.

12. Specify required virtual disk parameters.

StarWind iSCSI SAN & NAS: Multipathing

13. Click Next to continue.

14. Select a virtual disk that will be made accessible via iSCSI.

StarWind iSCSI SAN & NAS: Multipathing

15. Click Next to continue.

16. Specify cache parameters of an image file device.

StarWind iSCSI SAN & NAS: Multipathing

17. Click Next to continue.

18. Specify target parameters. Select Allow multiple concurrent iSCSI connections (clustering) checkbox.

StarWind iSCSI SAN & NAS: Multipathing

19. Click Next to continue.

20. Check whether device parameters are correct. Click Back to make any changes. Click Next to continue.

21. Click Finish to close the wizard.

 

CONFIGURING ISCSI CLIENTS

Windows Server 2008

1. Launch Server Manager, select the Features item and click Add Features. Select Multipath I/O from the features list. Follow the wizard’s instructions to install it.

StarWind iSCSI SAN & NAS: Multipathing

2. Launch Microsoft iSCSI Initiator: Start > Administrative Tools > iSCSI Initiator. Navigate to the Discovery tab.

3. Click Discover Portal. In the Discover Target Portal dialog enter the first IP address of the StarWind Server. Click OK.

4. Click Discover Portal again. Enter the second IP address of the StarWind Server. Click OK.

StarWind iSCSI SAN & NAS: Multipathing

5. Navigate to the Targets tab. The previously created target is listed in the Discovered Targets section.

Note: If the created target is not listed, check the firewall settings on the StarWind Server as well as a list of networks served by the StarWind Server (go to StarWind Management Console -> Configuration -> Network).

6. Select the target and click Connect.

StarWind iSCSI SAN & NAS: Multipathing

7. In the Connect to Target dialog select Add this connection to the list of Favorite Targets and Enable multi-path checkboxes. Click Advanced.

StarWind iSCSI SAN & NAS: Multipathing

8. Select Microsoft iSCSI Initiator in the Local adapter text field. In the Target portal IP select the first IP address of the StarWind Server.

StarWind iSCSI SAN & NAS: Multipathing

9. Click OK. As you return to the previous dialog, click OK to go back to iSCSI Initiator Properties.

10. Select the same target and again click Connect.

StarWind iSCSI SAN & NAS: Multipathing

11. Perform the same actions as described above; this time specify another IP address as a target portal IP. Click OK.

StarWind iSCSI SAN & NAS: Multipathing

12. Connect the second path of the target and close the MS Initiator.

13. Open the MPIO manager: Start -> Administrative Tools -> MPIO.

14. Go to the Discover Multi-Paths tab. Select the Add support for iSCSI devices checkbox and click Add.

StarWind iSCSI SAN & NAS: Multipathing

15. When prompted to restart the server, click Yes to proceed.

StarWind iSCSI SAN & NAS: Multipathing

16. After the system reboot open the MPIO Manager again to ensure that the multipathed device has been recognized and added. A new device has to be displayed in the Devices list of the MPIO-ed Devices tab.

StarWind iSCSI SAN & NAS: Multipathing

17. Open the iSCSI Initiator and view the target properties. Select the target and click Properties.

StarWind iSCSI SAN & NAS: Multipathing

18. The Sessions tab contains two sessions that represent both network paths that you have set.

StarWind iSCSI SAN & NAS: Multipathing

19. Click Devices. This window displays general information about devices.

StarWind iSCSI SAN & NAS: Multipathing

20. Click MPIO. Select a load balance policy of your connections. A brief description of the selected policy is provided beneath the Load balance policy box.

StarWind iSCSI SAN & NAS: Multipathing

 

Windows Server 2012

1. Launch Server Manager, select the Manage item and click the Add Roles and Features option. Install the Multipath I/O feature by following the wizard’s steps.

StarWind iSCSI SAN & NAS: Multipathing

2. Click Next.

3. Select Role-based or feature-based installation as an installation type and click Next to continue.

StarWind iSCSI SAN & NAS: Multipathing

4. Select the Select a server from the server poll option and select the appropriate server.

StarWind iSCSI SAN & NAS: Multipathing

5. Click Next.

6. In the features list select Multipath I/O feature and install it.

StarWind iSCSI SAN & NAS: Multipathing

7. Launch Microsoft iSCSI Initiator: Start > Administrative Tools > iSCSI Initiator. The iSCSI Initiator Properties window appears.

8. Navigate to the Discovery tab.

9. Click Discover Portal. Enter the first IP address of the StarWind Server in the appropriate field of the Discover Target Portal dialog. Click OK.

10. Again click Discover Portal to add the second IP address of the StarWind Server.

StarWind iSCSI SAN & NAS: Multipathing

11. Click the Targets tab. The previously created targets are listed in the Discovered Targets section.

Note: If created targets are not listed, check the firewall settings of the StarWind Server as well as the list of networks served by the StarWind Server (go to StarWind Management Console -> Configuration -> Network).

12. Select the targets and click Connect to add it.

StarWind iSCSI SAN & NAS: Multipathing

13. Select Add this connection to the list of Favorite Targets and Enable multi-path checkboxes in the Connect to Target dialog. Click Advanced.

StarWind iSCSI SAN & NAS: Multipathing

14. Select Microsoft iSCSI Initiator in the Local adapter text field. In the Target portal IP select the first IP address of the StarWind Server. Click OK.

StarWind iSCSI SAN & NAS: Multipathing

15. Click OK to return to MS Initiator main window.

16. Select the same target and again click Connect. Perform the same actions as described above; this time specify another IP address as a target portal IP. Click OK.

StarWind iSCSI SAN & NAS: Multipathing

StarWind iSCSI SAN & NAS: Multipathing

17. Connect the second path of the target and close the MS Initiator.

18. Open the MPIO manager: Start -> Administrative Tools -> MPIO.

19. Go to the Discover Multi-Paths tab. Select the Add support for iSCSI devices checkbox and click Add.

StarWind iSCSI SAN & NAS: Multipathing

20. When prompted to restart the server, click Yes to proceed.

StarWind iSCSI SAN & NAS: Multipathing

21. After the system reboot open the MPIO Manager once again to check whether the multipathed device has been recognized and added. A new device should be displayed in the Devices list of the MPIO-ed devices tab.

StarWind iSCSI SAN & NAS: Multipathing

22. Open the iSCSI Initiator to check the target properties. Select the target and click Properties.

23. The Sessions tab contains two sessions that represent both network paths that you have set.

StarWind iSCSI SAN & NAS: Multipathing

24. Click Devices. This window displays general information about devices.

StarWind iSCSI SAN & NAS: Multipathing

25. Click MPIO. Select a load balance policy of your connections. A brief description of the selected policy is provided beneath the Load balance policy box.

StarWind iSCSI SAN & NAS: Multipathing