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i recently looked into game files of a Sega Dreamcast game called "Tokyo Bus Guide", and i found a odd thing, there were tons of duplicate files!

when i researched on it and an Quora Comment Said it was a technique used back in the days to reduce load times as the disk reader head can read the copy of that file near it...

i wanted to know how does this actually work? and how does the disk reader know about a duplicate file near it?

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  • Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking.
    – Community Bot
    Commented Apr 9, 2023 at 17:59

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The quora answer already explained it. What didn't you understand?

On something as slow as a DVD, seek time was a biggie. It could take half a second to traverse inner to outer edge. HDD already made that less beneficial, SSD makes it pointless.

The reader has no clue there's another copy of the file somewhere else; it just fetches the one it's told to fetch, which the programmer ensures is physically nearby.

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  • so basically you're saying reader works normally, it's upto the software manage & to tell it to fetch the file near it
    – Aditya
    Commented Apr 13, 2023 at 16:26
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    …the same as any read operation. It only reads what it's told to read.
    – Tetsujin
    Commented Apr 13, 2023 at 16:32

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