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Do harddrives employ write spreading?

watdahel

watdahel

Limp Gawd
Joined
Dec 8, 2010
Messages
456
Well do they? Do harddrives have a read/write-wear strategy or do they always write sequentially, writing at the first empty sector? If I save a 2 MB file to disk and then erase it and then save again does it occupy the same physical space on the disk?
 
For the most part, they write to the sectors they're told by the OS to write to. However, if a sector becomes unreadable, the drive can remap that sector to a spare.

As for deleting a file and re-saving it, it depends on the the OS and the file system it's using whether or not it'll occupy the same space.
 
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