Explanation: On a tape mount request, the configured tape drive's no-rewind-on-close device file was neither a character-special device nor of a known type such as NDMP. (NDMP does not need to be a character special file.)
To avoid configuring invalid device paths and device names, use the Device Configuration wizard (on supported device discovery platforms). The wizard automatically configures paths and device names for tape drives.
Always use no-rewind tape device files or recognized drive name syntax (such as for NDMP) for tape drives. Make sure that the specified device paths exist as character-special files. Check for detailed errors from the command or the user interface output.