Documentation change related to the following

If you are running OpenShift Container Platform on IBM Z with RHEL KVM, you must assign a serial number to your VM disk. Otherwise, the VM disk can not be identified after reboot. You can use the virsh edit <VM> command to add the <serial>mydisk</serial> definition.

4.12

I don't see real reason why it will be different on IBM Z and x86-64 platform. I guess diskmaker-manager pod created the /mnt/local-storage/<storageclass_name>/<dev_disk/by-id_driver-serial> for all platform the same way.

We have reproduced this issue on X86-64 cluster and we had to put serial in virsh to make it works.

Please discuss it with engineering for a second feedback, but I guess this recommendation should be platform independant.