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Installing or upgrading Double-Take Availability

Use these instructions to install Double-Take Availability or upgrade an existing Double-Take Availability installation.

1. Close any open applications.
2. Start the installation program using the appropriate instructions, depending on your media source.
• CD—Load the Double-Take Availability CD into the local CD-ROM drive. If auto-run is enabled, the installation program will start automatically. To manually start the program, select Start, Run and specify <cd_drive>:\autorun.exe.
• Web download—Launch the .exe file that you downloaded from the web.
3. When the installation program begins, the Double-Take Software Setup Launcher appears allowing you to install software and view documentation for various applications from Double-Take Software. The listed applications will depend on which products are included on the CD or in the web download. To install Double-Take Availability, select Double-Take Availability from the list of products. Under Product Installs, select Double-Take Availability.
4. Depending on your version of Windows and the components you have installed, you may see an initial screen indicating that you should install or enable Microsoft .NET Framework. If you do not see this screen, your server already has the appropriate version of Microsoft .NET. You should install or enable Microsoft .NET before installing Double-Take Availability. Click Yes to install Microsoft .NET. Click No to continue without installing .NET.
5. When the Double-Take Availability installation begins, you will be given the opportunity to check for a more recent version of the software.
• If you do not want to check for a later version, select No and click Next.
• If you want to check for a later version, select Yes and click Next. The installation program will establish an Internet connection from your server to the Double-Take Software web site.
• If later versions are found, they will be listed. Highlight the version you want and either download that version and install it automatically or download that version and exit the installation. (If you exit the installation, you can run the updated installation later directly from the location where you saved it.)
• If no later versions are found, continue with the current installation.
• If an Internet connection cannot be established, continue with the current installation or install a previously downloaded version.
6. Review and accept the Double-Take Software license agreement to continue with the installation program. Click Next to continue.
7. Select the type of installation you would like to perform on this machine.
• Client and Server Components—This option installs both the client and server components. The server components are required for systems that will function as a source or target. The server requires an activation code for the service to run. The client does not require an activation code, but it is required to administer this and other servers throughout the organization.
• Client Components Only—This option installs only the client components. The client components do not require an activation code, but are required to administer servers throughout the organization.
• Server Components Only—This option installs only the server components. The server components are required for systems that will function as a source or target. The server requires an activation code for the service to run.
8. If desired, specify where the Double-Take Availability files will be installed.
9. Click Next to continue.
10. You will be prompted to enter your activation code information. Your Activation Code is a 24-character, alpha-numeric activation code which applies the appropriate license to your installation. You must have a valid activation code to use Double-Take Availability. Enter your code and click Add.
11. Click Next to continue.
12. The next screen will depend on the activation code you entered.
• If you have entered a valid activation code, you will be prompted to confirm the code. Click Next to continue the installation.
• If you have entered an invalid activation code, you will be prompted that the code is incorrect and that the source and target modules will not load. Click Back and reenter your activation code.
• If you have entered an evaluation activation code, the expiration date will be displayed and you will be prompted that the source and target modules will not load after that date. Click Next to continue the installation. You must update the activation code to a valid one before the expiration date, otherwise, on the expiration date, Double-Take Availability functionality will be disabled.

13. Double-Take Availability uses system memory to store data in queues. Specify the maximum amount of system memory to be used for the Double-Take Availability queues and click Next to continue.

    If you set the system memory queue lower, Double-Take Availability will use less system memory, but you will queue to disk sooner which may impact system performance. If you set it higher, Double-Take Availability will maximize system performance by not queuing to disk as soon, but the system may have to swap the memory to disk if the system memory is not available. In general, the amount of memory Double-Take Availability and other applications on the server are configured to use should be less than the amount of physical memory on the system to prevent low memory conditions.

14. When the Double-Take Availability system memory queue is exhausted, Double-Take Availability will queue to disk. Specify the size and location of the disk queue. (See Queuing data for guidelines on selecting an appropriate location.) By default, the disk space is set to Unlimited which will allow the queue usage to automatically expand whenever the available disk space expands. Click Next to continue.
15. The Double-Take Availability security information screen appears next. Review this information and click Next to continue with the installation.
16. If you are satisfied with the selections you have made and are ready to begin copying the Double-Take Availability files, click Install.
17. During the installation, you may be prompted to add an exception to the Windows Firewall for Double-Take Availability. Click OK to add the port exception. If you Cancel the port modification, you will have to manually modify your firewall settings for Double-Take Availability processing.
18. After the files have completed copying, click Finish to exit the installation program.

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