TNA also hears that IBM has set a very high priority on minimising the likelihood that the database, inherited from System 38, will go down: it believes that at the base of the rack, at least on the higher end models, there will be installed an uninterruptable power supply as standard – uninterruptable really means graceful degradation, and batteries with perhaps 15 minutes of power ensure that the thing goes down slow rather than crashing when Con Ed or the CEGB pulls the plug.