Configuring automatic path correction

You can configure NetBackup to run an automated form of device discovery when the Device Manager (ltid) starts.

If configured, NetBackup recognizes if you change a device because the serial number of the new device is different than the serial number of the old device. NetBackup updates the device configuration automatically.

(By default, Windows and Linux systems are configured for automatic path correction.)

NetBackup recognizes device changes as follows:

When the Device Manager (ltid) performs automatic path correction.
When the Windows Plug-n-Play feature performs serial number checks.

Enable the automated path correction by using the vm.conf file AUTO_PATH_CORRECTION option.

See AUTO_PATH_CORRECTION in the NetBackup Administrator's Guide for Windows, Volume II.

In some circumstances, NetBackup may be unable to determine the correct serial number in a small number of tape drives and robotic libraries. For example, NetBackup may configure serialized devices as unserialized or configure a device with the wrong serial number. If so, a device may be unusable (such as the tape drive may be downed).

To resolve such a problem, do one of the following actions:

Configure the new device by using the Device Configuration Wizard.

See Configuring robots and drives by using the wizard.

The server operating system must recognize the device before you can configure it in NetBackup. Device configuration can require remapping, rediscovery, and possibly a restart of the operating system.

See the NetBackup Device Configuration Guide.
Disable the automated device discovery by using the vm.conf file AUTO_PATH_CORRECTION option.