Because this article caught my eye and the topic is still important.
You probably know, there is difference in the way hardware and software vendors quote their capacities.
Normally hardware vendors use KB, MB, GB, TB, … Here 1 KB means 10^3 byte (base 10) = 1000 bytes (k stands for kilo which means 1000)
Software vendors instead use KiB, MiB, GiB, TiB, … Here 1 KiB means 2^10 byte (base 2) = 1024 bytes. As you can see, size-difference with KB vs. KiB is quite small: 24 byte (2,3 % less capacity with KB)
When it comes to greater unites, difference is getting larger:
- 1 GB = 10^9 vs 1GiB = 2^30 = 1 073 741 824 --> ~ 7 % less capacity with GB
- 1 TB = 10^12 vs 1 TiB = 2^40 = 1 099 511 627 776 --> ~ 9 % less capacity with TB (~90 GiB)
The greater the unit, the greater the difference between base of 10 and 2.
I (quickly and dirty) created a small graph to show percentage increase over units
Another outcome of this article is the fact, that not all vendors use the same units for disks capacities for example (sometimes not even within the same document). So one talk about GB anther about GiB. Another example of making this topic more terrible is Apple. Apple changed used unit from base 2 to base 10 with iOS 10 (was that a coincidence )
So take care what unit vendors are talking about. You could be in serious troubles when you size for TiB and buy TB!