What you should know about the z/VM unit record device driver

SUSE Linux Enterprise Server 15 SP5 z/VM guest

The z/VM unit record device driver is compiled as a separate module, vmur. When the vmur module is loaded, it registers a character device.

When a unit record device is set online, a device node is created for it.

  • Reader: /dev/vmrdr-0.0.<device_number>
  • Punch: /dev/vmpun-0.0.<device_number>
  • Printer: /dev/vmprt-0.0.<device_number>