Two a day keeps stagnation away
How did MS-DOS decide that two seconds was the amount of time to keep the floppy disk cache valid?

How did MS-DOS decide that two seconds was the amount of time to keep the floppy disk cache valid?

MS-DOS 2.0 contained a disk read cache, but not a disk write cache. Disk read caches are important because they avoid having to re-read data from the disk. And you can invalidate the read cache when the volume is unmounted.

Read more: https://devblogs.microsoft.com/oldnewthing/20190924-00/?p=102915

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