Comment 2 for bug 1723541

according to
z/VM, CP Messages and Codes, Version 6 Release 3
http://publibz.boulder.ibm.com/epubs/pdf/hcsb4c23.pdf
the PSW points to:
HCP4500W I/O error: Enabling the IPL device failed Explanation: The stand-alone dump IPL tool could not enable the IPL device. System action: The system enters a disabled wait state (wait state code = 4500). User response: Check the hardware configuration of your IPL device

assuming an issue with zipl

syslog search for zipl shows:
..not invoking zipl: /etc/zipl.conf not found...

Oct 16 05:36:21 in-target: WARNING, not invoking zipl: /etc/zipl.conf not found^M
Oct 16 05:36:22 zipl-installer: Root filesystem on /dev/mapper/hwe0009--vg-root (/dev/mapper/hwe0009--vg-root)
Oct 16 05:36:22 zipl-installer: info: Root filesystem is on LV ( hwe0009-vg root)
Oct 16 01:36:22 zipl: Boot loader written to dasda - 5e:00
Oct 16 05:36:22 zipl-installer: Using config file '/etc/zipl.conf'
Oct 16 05:36:22 zipl-installer: Ignore section 'old': Image file '/boot/vmlinuz.old'
Oct 16 05:36:22 zipl-installer: Run /lib/s390-tools/zipl_helper.device-mapper /boot
Oct 16 05:36:22 zipl-installer: Target device information
Oct 16 05:36:22 zipl-installer: Device..........................: 5e:00 *)
Oct 16 05:36:22 zipl-installer: Device name.....................: dasda
Oct 16 05:36:22 zipl-installer: Device driver name..............: device-mapper
Oct 16 05:36:22 zipl-installer: Type............................: disk device
Oct 16 05:36:22 zipl-installer: Disk layout.....................: SCSI disk layout *)
Oct 16 05:36:22 zipl-installer: Geometry - start................: 280 *)
Oct 16 05:36:22 zipl-installer: File system block size..........: 4096
Oct 16 05:36:22 zipl-installer: Physical block size.............: 4096 *)
Oct 16 05:36:22 zipl-installer: Device size in physical blocks..: 1303552
Oct 16 05:36:22 zipl-installer: *) Data provided by script.
Oct 16 05:36:22 zipl-installer: Building bootmap in '/boot'
Oct 16 05:36:22 zipl-installer: Building menu 'menu'
Oct 16 05:36:22 zipl-installer: Adding #1: IPL section 'ubuntu' (default)
Oct 16 05:36:22 zipl-installer: initial ramdisk...: /boot/initrd.img
Oct 16 05:36:22 zipl-installer: kernel image......: /boot/vmlinuz
Oct 16 05:36:22 zipl-installer: kernel parmline...: 'root=/dev/mapper/hwe0009--vg-root crashkernel=196M'
Oct 16 05:36:22 zipl-installer: component address:
Oct 16 05:36:22 zipl-installer: kernel image....: 0x00010000-0x003e4fff
Oct 16 05:36:22 zipl-installer: parmline........: 0x003e5000-0x003e5fff
Oct 16 05:36:22 zipl-installer: initial ramdisk.: 0x003f0000-0x01142fff
Oct 16 05:36:22 zipl-installer: internal loader.: 0x0000a000-0x0000cfff
Oct 16 05:36:22 zipl-installer: Ignore #2: IPL section 'old'
Oct 16 05:36:22 zipl-installer: Preparing boot device: dasda.
Oct 16 05:36:22 zipl-installer: Detected plain SCSI partition.
Oct 16 05:36:22 zipl-installer: Writing SCSI master boot record.
Oct 16 05:36:22 zipl-installer: Syncing disks...
Oct 16 05:36:22 zipl-installer: Done.