FWIW, turns out one of the postscripts was calling to download/install the LVM suite from a local repo that was offline, then ran a vg create and fed some args to grub2-mkconfig which dutifully pointed to a logical volume that didn't exist and then rebooted at the end of the script. Of course, when the system came up, the lv wasn't there and hence dracut-emergency shell, which would have been a lot nicer if it had more utils to check/fix more stuff. Quick fix was to fix the repo, better/next fix would be a smarter script and/or don't needlessly create vg's.
Cheers, S ________________________________
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