how elevator algorithm works in modern hard disks?

Hi Everyone,
It's said that physical geometry is invisible to the cpu and is
unimportant. However, if the geometry is entirely different with the
logical one, which the cpu can see, how does elevator algorithm work?
As we know, elevator algorithm always find the nearest block in some
direction, which depends on the actual geometry of a disk.

Elevator algorithm is used in linux kernel, so there must be some
details that I don't know. Could anyone tell me?

Thanks in advance.

Best Regards,
Forrest
.

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