Category Archives: IT

Anything to do with computers, gadgets, gizmos

How many books would fit into a modern solid state drive?

Book and SSD
That’s the new drive in its packaging down on the right

James Joyces’ Ulysses (a famously long book) contains 265,000 words
Formatted as a simple Word document without images it occupies 1.66 MB on my hard drive.
So, dividing 250 Gigabytes by 1.6 Megabytes: 250,000,000,000 ÷ 1,660,000
gives the answer:  = 150,600 copies of Ulysses would fit onto the 250GB SSD

Let’s try to picture that:
One copy of this nice Folio edition weighs 3.5 kg
Therefore that makes a total of 527,108 kg = 518 UK tons  (about 100 elephants) fitting in the SSD

Shelf Space
One copy is 5 cm thick
That makes a total of 753,000 cm = 7.53 km of shelf space

Area of Paper
This Folio edition of Ulysses has 735 pages, each measuring 18 × 23.3 cm, that is 419.4 cm² (0.4194 m²)
0.4194 m² × 734 pages makes a total of 308 m² of typescript per copy (halved if you use Roughly a 4.8km square on Londonboth sides)
Therefore – Total area of paper required for the number of copies which would fit into the little SSD drive = 46,423,805 m²

There are one million square metres in one square kilometre, therefore it would require 46.4 km² of paper to store that amount of text.
That is a square 6.8 km on each side.

Here is a square of that size over central London (the fine grid lines on OS maps – just visible here – are 1km apart)

Wow! Or as the grandchildren would say, ‘awesome’.

New love affair

It takes time to get your head around having your own solar power.

Our PV roof panels were switched on three days ago and we have already generated (…gets up to look at the meter behind him on the wall…) 57.1 kilowatt hours. That’s much more power than we have used in that time. That’s a lot. Much more than I imagined.

Our system has a little bonus gizmo so that when we are not using all the power we generate (most of the time) the excess is fed automatically into the immersion heater in our hot water cylinder. So we switched off the gas boiler when the PV came on stream and we still have piping hot water for showers each morning. (That means zero energy cost, folks.)

But the thing which is so novel and which takes some really believing is that during the day we can use as much hot water as we like and there is absolutely no cost whatsoever – not to us and not to the planet: we are just using the heat from the sun that would have fallen on that part of the roof anyway.


Why isn’t everyone doing this!

Another thing: When the energy performance certificate for our house was done just six months ago the assessor estimated that a 2.5kW solar array would cost future owners (i.e. us) between £9,000 and £14,000. In fact our state-of-the-art array, installed with meticulous care and attention to detail last week, actually cost us £6,500. And it generates 4kW, getting on for twice as much as that estimate, for less than half the price.

Bottom line – even the experts have not understood how quickly solar power is becoming hugely cost effective.

And our bottom line is the profound satisfaction we are getting. We even have a new electric lawnmower, which – wait for it – gets used in summer and always during the day – isn’t that just beautiful.

Our system was generating 1kW at 8.00 this morning and 1.3kW at 6.00 this evening. And it is early April in supposedly dark and dreary England. Isn’t that beautiful too!

Oh yes, it peaked at just over 3kW. Eight panels on the East sloping roof and another eight on the West.

Am I becoming a  bore? Not to me. It’s wonderful!