Conversion from 100 Zettabits per second to Zettaoctets per second

Information about the Zettabit per second (Zbit/s)

The zettabit per second is a unit of data transfer rate equal to a thousand exabits per second. Its symbol is Zbit/s. No system on Earth moves data at this rate, and none is planned; the unit exists because the metric system defines every prefix for every unit, whether or not the combination has yet been needed.

To see how far off it is, take the whole internet. Global traffic at present runs at roughly one exabit per second on average, so the entire planet's communications would have to grow a thousandfold to reach one zettabit per second. At the growth rates of the last two decades that would take somewhere between twenty and thirty years, which is precisely the sort of extrapolation that has been wrong in both directions before.

A zettabit per second is 125 exaoctets per second. Since global data storage manufacturing runs at a few hundred exaoctets a year, a link at this rate would transfer the world's entire annual production of new storage capacity in a couple of seconds. Nothing could be stored at the far end; the data would have to be processed and discarded as it arrived.

That last point is not as fanciful as it sounds. Several existing systems already discard almost everything they receive: particle detectors, radio telescope arrays and network monitoring systems all process far more than they keep, because keeping it is impossible and unnecessary. A zettabit-per-second link would be an extreme case of an architecture that already exists.

The physical obstacles are less absolute than they might appear. The theoretical capacity of a single optical fibre is far above what is used today, and the practical limits come from amplifier noise, non-linear effects and the electronics at each end rather than from the glass itself. Aggregating enough fibres would reach a zettabit per second; the difficulty is that nobody has a reason to.

For a converter, the unit matters because forecasts and capacity models are written in whatever unit keeps the numbers legible. A projection that reaches into the 2050s may reasonably state totals in zettabits per second, and a reader needs to be able to convert that into something familiar.

One zettabit per second equals 1,000 exabits per second, 125 exaoctets per second, or about 0.8470 zebibits per second.

Information about the Zettaoctet per second (Zo/s)

The zettaoctet per second is a unit of data transfer rate equal to a thousand exaoctets per second, or eight zettabits per second. Its symbol is Zo/s. A link running at this rate would transfer everything humanity has ever stored in well under a second, which is the clearest way to state how far beyond present engineering it lies.

The comparison is worth making carefully. Estimates of the world's total stored data run to a few hundred zettaoctets, so a zettaoctet per second would move all of it in a few minutes at most, and a substantial fraction of it every second. Nothing could produce data at that rate and nothing could store it, so the unit describes a capacity with no possible source and no possible destination.

Energy is the constraint that makes this more than a matter of engineering effort. Transmitting a bit costs energy — in the optics, in the electronics that drive them, and in the cooling that removes the waste heat. Current optical systems use on the order of a picojoule per bit end to end. At a zettaoctet per second, that works out to gigawatts of continuous power for the link alone, which is the output of several large power stations.

That figure is not a hard physical limit but an engineering one, and it has fallen steadily. The energy cost per bit of optical transmission has dropped by orders of magnitude over forty years and continues to fall. The theoretical floor, set by thermodynamics, is far lower still, so the obstacle is technique rather than physics.

The unit's practical role is in the completeness of the prefix system rather than in any application. A table of transfer rates that stops before zetta would force anyone who needed it to invent a name, and competing invented names are how measurement systems fragment. Defining the whole ladder costs nothing and prevents that.

For a converter, the arithmetic is the same as for any other prefix: a zettaoctet per second is eight zettabits per second, a thousand exaoctets, and a million petaoctets. The rule does not change because the quantity is unattainable.

One zettaoctet per second equals 1,000 exaoctets per second, 8 zettabits per second, or about 0.8470 zebioctets per second.