Device configuration status code: 29

Message: Drive index is in use by another drive

Explanation: On a request to add a drive to the device configuration, the requested drive index was in use on the targeted device host.

To avoid configuring a drive index that is already in use, use the Device Configuration wizard (on supported device discovery platforms). The wizard automatically configures the drive index.
If you use a device configuration interface that allows the drive index to be specified, do the following: use tpconfig -d to determine the drive indexes already in use on the targeted device host. Then specify a drive index that is not in use.