“I'd like to use this for an embedded unix application. I'll do fstrim, swap in ram, etc, but the filesystem isn't gong to be FAT/exFAT, so I'm concerned that the wear leveling algorithm won't know how to do its job and that cells will expire prematurely.”
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Wow, that's a question I would never have expected to see on Best Buy. I've worked with most of the SSD and controller companies for use in medical products using FAT FSs and have been told that while the algorithms have been developed with directory and FAT updates in mind that the algorithms are independent of the file system installed. As I recall, Samsung uses one of the 3rd party controllers which should adapt to your specific usage. I don't know your exact use case but can tell you we use qualification software that executes hundreds of thousands of writes to a single sector and that all leveling algorithms we've seen have no issues with that.
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