I often find myself explaining the same things in real life and online, so I recently started writing technical blog posts.
This one is about why it was a mistake to call 1024 bytes a kilobyte. It’s about a 20min read so thank you very much in advance if you find the time to read it.
Feedback is very much welcome. Thank you.
Huh? What does how a drive size is measured affect the available address space used at all? Drives are broken up into blocks, and each block is addressable. This is irrelevant of if you measure it in GB or GiB and does not change the address or block size. Hell, you have have a block size in binary units and the overall capacity in SI units and it does not matter - that is how it is typically done with typical block sizes being 512 bytes, or 4096 (4KiB).
Or have anything to do with ware leveling at all? If you buy a 250GB SSD then you will be able to write 250GB to it - it will have some hidden capacity for ware-leveling, but that could be 10GB, 20GB, 50GB or any number they want. No relation to unit conversions at all.
Sorry, I probably wasn’t clear. You’re right that the units don’t affect how the address space is used. My peeve is that because of marketing targeting nice round numbers, you end up with (for example) a 250GB drive that does not use the full address space available (since you necessarily have to address to up 256GiB). If the units had been consistent from the get-go, then I suspect the average drive would have just a bit more usable space available by default.
My comment re wear-levelling was more to suggest that I didn’t think the unused address space (in my example of 250GB vs 256GiB) could be excused by saying it was taken up by spare sectors.