>From what I've seen of recent RedHat systems,  they are using an initrd,
so there  *is no*  DASD=  token in the parm line as the system is IPLed.

There are variations on this theme,  but one is

        IPL with RAMDISK (initrd)
        run module-loading logic from the RAMDISK
        mount the real root volume
        do a 'pivot_root' to the newly mounted "real root"
        unmount the RAMDISK
        proceed now with normal INIT

So it is in step #2 where the DASD driver gets loaded,
always as a module,  never compiled-in.   So in a case like this,
no amount of mucking with the parm file nor with ZIPL will work.
Thus,  the 'mkinitrd' command is always required to change it.

It's getting harder to determin a guest's profile
without actually bringing it up.   [sigh]

-- R;

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