Logical tape device files are found in the /dev/rmt/* directory as symbolic links from the /devices directory. The naming convention is /dev/rmt/nd.
Devices directory
Raw magnetic tape device directory
Drive number (0-n
Optional density, which can be l (low), m (medium), h (high), u (ultra), or c (compressed).
The first tape device connected to the system is 0 (/dev/rmt/0). Tape density values are described in Chapter 11, Managing Tape Drives (Tasks).