Twas the month before Christmas, all through the house
  No spod uncomfortable, not even with their nouse
Faith in DRUPS being spun with great care
  I got dual three-phase, resplendent with flair

Clientel nestled all snug in their racks
  With pulses of sine-wave neath their square backs
Red shirts on brief, keyboards on laps
  Awaiting their nightly, brief night-time knaps

When out in the carpark there arose such a clatter
  Two seconds! Every pager did spatter the matter
Away down Docklands they flew in a flash
  Tore open the shutters and swore at the crash

Black floors grieving, four fallen co-lo
  Lacklustre faces rosé, glum and glow-low
When, upon my wandering iBox should appear
  A customer update, first one of twenty—I fear

Rotated email phrases, devoid, terse and bity
  We knew in a moment, came from er, tellyerwotsit…
More main breaks, and more cursers they came
  Power busses, red, unphased, untame, power lame

To transfer ecstatic German Vorsicht:  Switch outright!
  Quick dash! Second bash… way past four (not even sleight)
Now Grid! Drups, UPS and Mains! Genny's totally gone…
  So find the ignitron, und fingerpokin blinkenlichten



Paul Sladen, 23 November 2015.  Public domain.  To be continued, possibly…
Inspiration courtesy of Clement Clarke Moore and a seemingly powerless data-centre owner
https://en.wikisource.org/wiki/A_Visit_from_St._Nicholas