So yesterday I had a grub issue that required me to comment out the other two drive sin my fstab that get mounted.1. an ssd that houses my qcow2 vm.2. a 1tb seagateSo all I had listed was / and swap.  After I got booted in to the system I notice the ssd which was /dev/sdd changed to /dev/sdc.  OK I thought.. whatever I'll recreate the vm to look at sdc now.  Fast forward to 20 minutes ago, my vm stopped booting, upon further inspection sdc was now back to sdd.  What gives?  What could cause this or where can I look to determine the cause?
Ubuntu 16.04, drive path changed on its own
ubuntu;mount;kvm;fstab