Bug 979269

https://fedoraproject.org/wiki/Features/DracutHostOnly

If you change your machine or partitions or significant hardware, you might have to boot with the "Rescue" boot entry and execute "dracut --regenerate-all". If you want your initramfs to be hardware independent, install the "dracut-nohostonly" rpm package. If you don't want rescue images at all (like in virtual machines), install the "dracut-norescue" rpm package.

Here's what set up the failure leading to filing this:
1-Bug 974467 prevented a fresh install of F19 from which to convert to Rawhide.
2-All my systems are for all practical purposes multiboot (most have more than 4 operating systems installed, many more than a dozen, most including DOS and/or Windows and/or OS/2).
3-None of my systems need Grub2 features lacking in Grub Legacy, so in keeping with KISS as much as practical, and wishing to keep space required for / filesystems to a minimum, with few exceptions, I disallow installation of Grub2.
4-When the existing F19 installation was made, I didn't know about any hidden syslinux installation option. Maybe it didn't yet exist.
5-I installed F19 selecting the no bootloader option.
6-I made the clone.
7-The Grub Legacy I installed and maintain manually, usually uses root=LABEL=<label> syntax for each stanza, sometimes uses root=<devicename> syntax, and never uses root=<uuid> syntax.
8-The installed Grub uses the standard 8.3-compatible Grub Legacy menu configuration file: menu.lst. I failed to symlink menu.lst to grub.conf, so Grubby never created a stanza utilizing the rescue kernel and initrd.
9-I botched my initial attempt to use the rescue kernel and initrd.

(In reply to Harald Hoyer from comment #1)
> https://fedoraproject.org/wiki/Features/DracutHostOnly
 
> If you change your machine or partitions or significant hardware, you might
> have to boot with the "Rescue" boot entry and execute "dracut
> --regenerate-all".

On successful boot using rescue kernel and initrd

  dracut --regenerate-all

failed to create new images, indicating --force would be required to overwrite existing.

The string "regenerate" is missing from output of 'dracut --help'.

Both clone source and target have been successfully booted from regenerated images.

> If you want your initramfs to be hardware independent,
> install the "dracut-nohostonly" rpm package.

While good to know, I'm not currently interested in hardware independence, only respect for valid cmdline parameter(s). (see e.g. first paragraph at https://fedoraproject.org/wiki/Dracut/Options#Dracut_kernel_command_line_parameters, which explicitly lists as examples root=/dev/hda1 and root=LABEL=rootPart)

dracut-032 supports:

$ man dracut:

       --persistent-policy <policy>
           Use <policy> to address disks and partitions.  <policy> can be any
           directory name found in /dev/disk. E.g. "by-uuid", "by-label"

$ man dracut.conf

       persistent_policy="<policy>"
           Use <policy> to address disks and partitions.  <policy> can be any
           directory name found in /dev/disk. E.g. "by-uuid", "by-label"

As is typical of man pages, comment 3 includes no example that might explain how comment 3 would solve the problem reported. What does any policy have to do with obeying a traditional root= cmdline option? How would one go about testing the efficacy of this purported "solution"?