Working with the z/VM *MONITOR record reader supportEdit online You can open the z/VM® *MONITOR record character device to read records from it.Opening and closing the character deviceOnly one user can open the character device at any one time. Once you have opened the device, you must close it to make it accessible to other users.Reading monitor recordsYou can either read in non-blocking mode with polling, or you can read in blocking mode without polling.Parent topic: Reading z/VM monitor records