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ba7ka7a написа: 01.05.2026, 19:15:04 windows използва киби, меби, гиби, теби и т.н. байти въпреки че ги показва като кило, мега, гига и тера байти. От там идва разликата.

Аз съм в IT бранша от 35 години. В този бранш KB, MB, GB, TB винаги са били и продължават да са си означения за брой байтове в конкретни степени на числото 2 (2^10, 2^20, 2^30, 2^40). Виж RAM-паметите, например. Защо при паметите MB = 2^20 = 1 048 576 и GB = 2^30 = 1 073 741 824, а при дисковете MB = 1 000 000 и GB = 1 000 000 000 000 ? Ами защото производителите на дискове намериха прост начин да продават дискове с по-малък капацитет, а да лъжат потребителите, че им продават по-голям.

Цитати от коментарите към видеото:

Maxtor was the first HDD company to switch to 1 MB = 1 million bytes in their labeling in the early/mid 1990s. Everyone else used 1 MB = 2^20 bytes. Maxtor (now a part of Seagate) was a low-end budget HDD manufacturer back then, and someone in their marketing division saw this as an easy way to sell a smaller drive which could "compete" with larger drives from other manufacturers. Everyone complained about it, but since they were actually using the correct SI definition they couldn't really stop Maxtor from doing it. One by one, each HDD manufacturer switched. The last holdout was IBM (which became Hitachi, which became WD), who switched around 2000.

HDD manufacturers used to use the binary calculation and you got 1024MB per GB give or take. But they decided to start using the decimal calculation about 25ish years ago as a way to artificially increase sizes.

Having been in the industry since the very early 1980's, RAM has always been measured and sold in "computer" kilobytes, megabytes, and gigabytes, meaning exponents of 2, and still is today. The first hard disk that I used with any regularity since the USAF bought them by the truckload, was the Seagate ST-225, which was marketed as a 20MB disk drive with just under 21 million bytes of storage. When formatted, MS-DOS reported it as 20MB. Seagate at that time used the binary measurement. As hard disk capacities increased, one of the hard disk manufacturer's marketing departments (unfortunatley, I cannot recall which one), had the bright idea to make their drives look bigger than the competition by using the exponent of 10 definition for megabytes and beyond, so since Seagate didn't want to be left behind, they followed suit. Everything else in a computer device uses exponents of 2. Even at the fundamental level, hard disks either have 512-byte or 4096-byte sectors (binary math if there ever was), yet the total storage capacity eschews that for sheer marketability.