Using cio_ignore

6.10 LPAR mode z/VM guest KVM guest

With cio_ignore, essential devices might be hidden.

For example, Linux® might not boot because the device with the root file system is ignored.

If Linux does not boot under z/VM® and does not show any message except:

HCPGIR450W CP entered; disabled wait PSW 00020001 80000000 00000000 00144D7A

Check if cio_ignore is used and verify that the console device, which is typically device number 0.0.0009, is not ignored.