But most users don't care how much theoretical space a "32-bit filesystem" has. They have 1TB drives and want to know practically how many hours of high-def videos they can store on it, how many Bluray movies they can rip. Try doing your computations with a "1TB" drive mixed with power of 2. prefixes.
I have posted the following mulitple times on slashdot: contrary to popular belief, power of 10 prefixes are
much more common than power of 2 prefixes in the computer industry. The only few places where the latter are used are to refer to RAM capacities and file sizes, whereas power-of-10 prefixes apply to most other areas and all units (not "only bitrates", as some claim): storage capacity, clock frequency, stream bandwidth, baud, pixel numbers, data throughput, processing power, etc.
- An 32 GB USB flash drive is 32 * 10^9 byte (power of 10)
- A 16 GB SD card is 16 * 10^9 byte (power of 10)
- A 50 GB dual-layer Blu-ray Disc is 50 * 10^9 byte (power of 10)
- A 4.7 GB single-layer DVD is 4.7 * 10^9 byte (power of 10)
- A 2.5 GHz processor is 2.5 * 10^9 Hz (power of 10)
- A PC6400 (as in 6400 MByte/s) memory module is 6400 * 10^6 byte/s (power of 10)
- A 25.6 GFLOPS CPU core is 25.6 * 10^9 FLOPS (power of 10)
- A 128 kbit/s audio stream is 128 * 10^3 bit/s (power of 10)
- An 8 kbaud V.92 modem is 8 * 10^3 baud (power of 10)
- A 6 Mpixel digital camera is 6 * 10^6 pixel (power of 10)
- A 4000 MB/s HyperTransport link is 4000 * 10^6 byte/s (power of 10)
- A 480 Mbit/s USB2 link is 480 * 10^6 bit/s (power of 10)
- A 5.0 Gbit/s PCI-E 2.0 lane (after 8b/10b encoding) is 5.0 * 10^9 bit/s (power of 10)
- A 500 MB/s PCI-E 2.0 lane (before 8b/10b encoding) is 500 * 10^6 byte/s (power of 10)
- A 1 Gbit/s ethernet card is 1 * 10^9 bit/s (power of 10)
- A 54 Mbit/s 802.11g network is 54 * 10^6 bit/s (power of 10)
- A 6.0 Gbit/s SATA link (after 8b/10b encoding) is 6.0 * 10^9 bit/s (power of 10)
- A 600 MB/s SATA link (before 8b/10b encoding) is 600 * 10^6 byte/s (power of 10)
- A 6 Mbit/s DSL line is 6 * 10^6 bit/s (power of 10)
- Curiosity: a 1.44 MByte floppy disk is 1.44 * 1000 * 1024 byte (mix of power of 10 and 2)
- And of course, a 1.5 TByte hard disk drive is 1.5 * 10^12 byte (power of 10)