Daily power failures allowed testing the wake-them-up drill. On all four occasions everything went smoothly (from sending the WOL packets, to restarting the running jobs). Which leads us to NMG's corollary to Murphys' ninth law : “Everything will appear to work beautifully until five minutes after you leave for summer vacations.”

Power failure caused two cores on n0002 to disappear. Had enough and rolled-back n0002 bios to v.1.4, which however is not identical release with the one found on the other nodes … ;-/