Each block on a SSD has a finite number of writes. This is mitigated on modern drives by "spreading" the writes around as you use the drive.
I'm wondering if you partition a SSD into several partitions (a Mac using Boot Camp, for example) if this measure is defeated somewhat - can the writes be spread across the entire drive? Or are they contained strictly within the partition boundaries? Any SSD controller engineers here :)?
Answer
It shouldn't matter. The drive doesn't know about partitions or file systems. It deals with blocks of pages, with a giant map of which "disk sectors" are in which pages. It will cycle through all the available blocks, whether writing the same sectors over and over, or writing to never-used sectors. (When "overwriting" a sector, it then knows that old page is now available.)
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