Examine command output, debug logs, and system logs for a more detailed message on the error.

Check for improperly configured cleaning media or interference with the drive cleaning operation. Check for bad media that may prevent unloading the drive. To avoid configuring incorrect device paths and device names, which is a common cause of drive unload problems, do the following: use the Device Configuration wizard (on supported device discovery platforms) so that device paths and device names can be automatically configured. Investigate the system log messages that are related to the specific error leading to the unload failure.