The device range specified for the cio_ignore kernel parameter is
syntactically incorrect. No devices specified with this range are
excluded from being sensed and analyzed.
User response
Correct your range specification in the kernel parameter line to have the
range of devices excluded when you next reboot Linux. You can write the
correct range specification to /proc/cio_ignore to add the range of devices
to the list of devices to be excluded. This does not immediately make the
devices in the range inaccessible but any of these devices are ignored if
they disappear and later reappear.