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On Thu, 1 Aug 2013, Joshua Skains wrote:

> After a cinder server is rebooted one day, it decided to stop creating /dev/disk/by-path links, causing VM's with attached volumes to fail to boot.
>
> I can manually create them with the iscsiadm command, but that of course does not survive a reboot. What is annoying is nothing is erroring out. Note, this used to work fine.
>
> Any thoughts are greatly appreciated!
>


this *could* be relevant
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1193705

basically by-path got dropped for some devices (ATA at least).
I also might just be providing you with re-herring.