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Installation and upgrade notes

Review the following installation and upgrade notes before beginning your installation or upgrade.

Since Double-Take Backup installs device drivers, it is recommended that you update your Windows Recovery Disk, before installing or making changes to your servers. For detailed instructions on creating a recovery disk, see your Windows reference manuals. Make sure that you select the option to back up the registry when building the repair disks.
Because Double-Take Backup has operating system dependent files, if you are upgrading your operating system (to a new major version, not a service pack) and have Double-Take Backup installed, you must remove Double-Take Backup prior to the operating system upgrade. Uninstall Double-Take Backup, perform the operating system upgrade, and then reinstall Double-Take Backup.
If you are installing to a drive other than the drive which contains your system TEMP directory, the Microsoft Windows Installer will still load approximately 100 MB of data to the TEMP directory during the installation. If you do not have enough disk space on the drive that contains the TEMP directory, you may need to change where it is located.
During installation, a file called dtinfo.exe is installed to the Double-Take Backup installation directory. This program can be run to collect configuration data for use when reporting problems to technical support. It gathers Double-Take Backup log files; Double-Take Backup and system registry settings; network configuration information such as IP, WINS, and DNS addresses; and other data which may be necessary for customer support to troubleshoot issues. After running the executable, a zip file is automatically created with the information gathered.
Double-Take Backup 5.2 can interoperate back to version 5.0 but has the following limitations. The Double-Take Backup clients can only control the same or earlier releases. To accommodate rolling upgrades, older sources can connect to newer targets, but newer sources cannot connect to older targets. Configurations not listed in the following chart are not supported.

Client	Source	Target	Supported
5.0	5.1 or 5.2	5.1 or 5.2	No
5.1	5.2	5.2	No
5.2	5.0	5.0, 5.1, or 5.2	Yes
5.2	5.1	5.0	No
5.2	5.1	5.1 or 5.2	Yes
5.2	5.2	5.0 or 5.1	No
5.2	5.2	5.2	Yes

When performing a rolling upgrade, update the target server first. After the upgrade is complete, any sources will automatically reconnect to the target. Upgrade the source(s) when convenient.