StarWind ISCSI Target For Microsoft Windows: StarWind And .

Rocket Division SoftwareTechnical Reference SeriesStarWind iSCSI Target for Microsoft Windows:StarWind and Double-TakeMay 1, 2007Rocket Division Softwarewww.RocketDivision.comCopyright Rocket Division Software 2001-2007. All rights reserved.StarWind iSCSI Target for Microsoft Windows: StarWind and Double-TakePage 1 of 68

Rocket Division SoftwareTechnical Reference SeriesINTRODUCTION . 7REFERENCE CONFIGURATION . 8INSTALLATION AND CONFIGURATION . 10PRIMARY STARWIND SERVER INSTALLATION . 10SECONDARY STARWIND SERVER INSTALLATION. 10CONFIGURE DOUBLE TAKE AND BEGIN REPLICATION AND MIRRORING . 11CONFIGURE PRIMARY STARWIND SERVER . 22. 27CONNECTING AND DISCONNECTING TARGETS . 34DATA RECOVERY . 40RECOVER INDIVIDUAL STARWIND DISK . 41RECOVER ENTIRE STARWIND SERVER BY REPLACEMENT . 52RECOVER ENTIRE STARWIND SERVER BY RESTORING . 63CONCLUSION . 69StarWind iSCSI Target for Microsoft Windows: StarWind and Double-TakePage 2 of 68

COPYRIGHTCopyright Rocket Division Software 2001-2007. All rights reserved. No part ofthis publication may be reproduced, stored in a retrieval system, or transmitted inany form or by any means, electronic, mechanical, photocopying, recording orotherwise, without the prior written consent of Rocket Division Software.TRADEMARKS“StarWind”, “Rocket Division Software” and the StarWind and the Rocket DivisionSoftware logos are trademarks of Rocket Division Software which may beregistered in some jurisdictions. All other trademarks are owned by theirrespective owners.CHANGESThe material in this document is for information only and is subject to changewithout notice. While reasonable efforts have been made in the preparation ofthis document to assure its accuracy, Rocket Division Software assumes noliability resulting from errors or omissions in this document, or from the use ofthe information contained herein. Rocket Division Software reserves the right tomake changes in the product design without reservation and without notificationto its users.TECHNICAL SUPPORT AND SERVICESIf you have questions about installing or using this software, check this and otherdocuments first - you will find answers to most of your questions here or there. Ifyou need further assistance, please contact us.

INTRODUCTIONTo build and maintain competitiveness in a 24/7 global economy every businessrelies on the availability and reliability of their computer systems and especiallythe data they create and use to run their businesses. Small-to-medium businesses(SMBs) are no different – they rely on the data in these critical systems topromote their business, sell and deliver their products, and to support theircustomers. If anything the availability and reliability of data is more critical forSMBs because they are less able to absorb the high costs and lost productivity theloss of critical business data represents. Losing even a single day worth of orders,or email communications with customers, can seriously harm a small business.In the past, the cost of solutions for better data protection and recovery havebeen outside the reach of SMBs. With the availability of a software-based iSCSIstorage area networking solution from Rocket Division Software (StarWind), anda powerful yet easy to use data replication solution from NSI Software (DoubleTake), businesses of every size can now easily and cost-effectively implement highavailability data storage and protection solutions.This document contains detailed information regarding the installation andconfiguration of Rocket Division Software’s StarWind iSCSI storage networkingsolution, and NSI Software’s replication engine Double-Take, to implement aconsolidated storage solution with improved data protection and recoverability.This document explains the implementation and configuration of StarWind datareplication/protection capabilities. Other documents are available to demonstratemore advanced configuration-specific iSCSI storage and data replication solutions.

REFERENCE CONFIGURATIONThe diagram below illustrates typical StarWind-based iSCSI storage networkarchitecture with Double-Take data replication for data protection andrecoverability. In the example shown, StarWind provides block level data storageservices to the File, Exchange and SQL Servers.Double-Take provides automated data replication services between the Primaryand Secondary StarWind Servers. A separate network segment is used for iSCSISAN traffic to ensure high-performance. Depending on data volumes and otherperformance parameters, use of the common network segment may be possible.In the diagram below, the Secondary StarWind Server stores a duplicated copy ofthe data residing on the Primary StarWind Server. Data is automatically andasynchronously replicated from the Primary to Secondary StarWind Server usingDouble-Take. Double-Take’s highly efficient replication engine allows theSecondary StarWind Server to be located at the primary facility or at a remotedisaster recovery site.In the event of the failure of the Primary StarWind Server the duplicate datamaintained on the Secondary StarWind Server can be used to restore criticalservices.

Exchange ServerFile ServerWeb ServerInitiator writes dataiSCSI SANSegmentPrimaryStarWind ServerwithDouble-TakeSecondaryStarWind ServerwithDouble-TakeDouble-Take replicates dataFigure 1. Reference ArchitectureReplication LAN orWAN Segment

INSTALLATION AND CONFIGURATIONRequirementsPrimary StarWind Server Operating system: Windows Server 2003 or Windows 2000 Server with thelatest service packs installed StarWind Double-Take 4.4.2Secondary StarWind ServerOperating system: Windows Server 2003 or Windows 2000 Server with thelatest service packs installed StarWind Double-Take 4.4.2PRIMARY STARWIND SERVER INSTALLATION Install StarWind using the default settings. Refer to the StarWindInstallation Instructions for details. Note: Do not create any StarWindtargets at this point in time. Create a directory that will hold all StarWind Disk files. For the purpose ofthis document this folder will be referred to as C:\SWDisks. Install Double-Take using the default settings. Refer to the 'Double-TakeGetting Started guide' for details.SECONDARY STARWIND SERVER INSTALLATION Install StarWind using the default settings. Refer to the StarWindInstallation Instructions for details. Note: Do not create any StarWindtargets at this point in time.Open the Services MMC snap-in, by clicking on Start - All Programs - Administrative Tools - Services Set the StarWind service to manual start. Stop the StarWind service. Click OK to save the changes. Install Double-Take using the default settings. Refer to the 'Double-TakeGetting Started Guide' for details.

CONFIGURE DOUBLE TAKE AND console. Select the target, which you wish toremove. Make sure the status of the StarWind Disk is Idle. If not – you shoulddisconnect target in the client-side initiator (see previous section for moreinformation on the required steps).

Right click the target.Select Remove from the popup menu.Restore StarWind Disk FileYou may now copy the StarWind Disk file from the Secondary StarWind Serverback to the Primary StarWind Server.Bring StarWind Disk OnlineThese steps must be performed on the Primary StarWind Server.

Launch the Start Management console. Right click on localhost:3260.Select Add device.

In the wizard that appears, select Image File device (a brief description of eachoption is displayed in the right area of the wizard window). You can display theonline help by clicking the Help button.Click the Next button to continue.

Select Mount existing image to mount an existing image that you’ve preparedbefore.Click the Next button to continue.

Click the “ ” button and choose the image file in C:\SWDisks directory. You willalso have to provide the image size in megabytes. Check any additionalparameters for the image you wish to create. Please refer to the online help fordetails regarding additional parameters (Asynchronous mode, Allow multipleconnections (clustering), Read-only mode and Specify advanced options).Click the Next button to continue.

Select a target name, this step is optional. The device will be identified to theiSCSI initiators connecting to the StarWind over an IP network, with this name.Click the Next button to continue.

The final step allows you to check if all of the device parameters are correct. Clickthe Back button if any changes are required.Click the Next button to continue.

The final screen of the wizard displays information about the recently createddevice is (see image below).Click the Finish button to close the wizard.

If everything went fine, the StarWind console should look like the image shownbelow.

RECOVER ENTIRE STARWIND SERVER BY REPLACEMENTIn the event that the Primary StarWind Server fails, the entire server can bephysically swapped and replaced by the Secondary StarWind Server. Thisapproach offers the quickest recovery time but requires the Secondary StarWindServer to be equipped with similar or better hardware capabilities to avoidperformance degradations.After the Secondary StarWind Server is setup at the primary location, ensure thenetwork identities are configured to reflect that of the original Primary StarWindServer. You will need to recreate each StarWind Disk as follows:Launch the StarWind console by selecting Start- All Programs- Rocket DivisionSoftware- StarWind- StarWind. After the console is launched its icon appears inthe system tray. Double click the icon with the left mouse button or single click itwith the right mouse button and select Start Management menu item from thepop-up menu.

From the Connections tree select the localhost:3260 which represents aloopback connection. Right click the desired host (computer) and select theConnect menu item. You will be prompted to enter the login and password.Default ones are: test, test. For security reasons it is advised that you changethese credentials later.Select Connect menu item to continue.

The Login dialog asking for the User name and the Password input looks like theone on the image shown below.Click the OK button to continue.

After you have successfully connected to the StarWind service, right click thedesired host (computer).Select Add device menu item to continue.

In the wizard that appears, please select Image File device (a brief description ofeach option is displayed in the right area of the wizard window). You can displaythe online help by clicking the Help button.Click the Next button to continue.

Select Mount existing image to mount an existing image that you’ve preparedbefore.Click the Next button to continue.

Press the “ ” button and choose image file in C:\SWDisks directory. Check anyadd

Launch the Microsoft iSCSI Software Initiator application by selecting Start- All Programs- Microsoft iSCSI Initiator- Microsoft iSCSI Initiator. Switch to the Discovery tab and then click the Add button in the Target Portals group. In the dialog that appears type in the IP address and port of the computer with StarWind installed.