Use this IBM ITDT tool to diagnose the health of your tape drive(s).
please note, this is not a Graphic Edition tool and might require some basic command line knowledge. Unfortunately, at the moment IBM doesn't offer GUI ITDT tool for macOS.
1. Download: ITDT tool for MacOS
2. Unzip the file if necessary.
3. Go to Finder, right click on the file install_itdt_se_MacOS_9.5.2.20211117 and select open with "Terminal"
4. If you get the popup window, click on Cancel
5. Go to System Preferences --> Security & Privacy --> General, and click on Allow Anyway
6. Go back to Terminal and type
~/Downloads/install_itdt_se_MacOS_9.5.2.20211117 [Enter]
7. You should get this popup window, click on Open
8. Go back to Terminal and type
~/ITDT/itdt [Enter]
followed by L [Enter], I [Enter]
ITDT should be ready.