About automatic path correction
NetBackup automatic path correction 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.
NetBackup recognizes device changes as follows:
When the NetBackup Device Manager (ltid) performs automatic path correction.
When the Windows Plug-n-Play feature performs serial number checks.
By default, Windows and Linux systems are configured for automatic path correction. On other operating systems, you must enable it.
See Enabling automatic path correction.
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 NetBackup Device Configuration 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, available at the following URL:
Disable the automated device discovery by using the
vm.conffile AUTO_PATH_CORRECTION option.