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> Hm, what's required to get the stripe size for doing IO or whatever
> the under-the-hood thing is for the Sharding?
>
i found that SATA protocol got enhanced for OS to be able to know what 
sector ranges are for each stripe.

So SMR optimized filesystem would certainly be nice. (but not ZFS please).

If your workload is not very write intensive, you may just ignore it and 
allow hard disk to simulate things.