cio.2b995e <device bus-ID> is not a valid device for the cio_ignore kernel parameter
Explanation
The device specification for the cio_ignore kernel parameter is
syntactically incorrect or specifies an unknown device. This device is not
excluded from being sensed and analyzed.
User response
Correct your device specification in the kernel parameter line to have the
device excluded when you next reboot Linux. You can write the correct
device specification to /proc/cio_ignore to add the device to the list of
devices to be excluded. This does not immediately make the device
inaccessible but the device is ignored if it disappears and later reappears.