When I create a 50G zvol, it gets "volsize" 50G, and it gets "used" and 
"refreservation" 51.6G

I have some filesystems already in use, hosting VM's, and I'd like to mimic the 
refreservation setting on the filesystem, as if I were smart enough from the 
beginning to have used the zvol.  So my question is ...

What's the extra 1.6G for?
If I have a filesystem holding a single VM with a single 2T disk, how large 
should the refreservation be?

If it's a linear scale, it should be 2.064T refreservation.
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  • [zfs-discuss] zvo... Edward Ned Harvey (opensolarisisdeadlongliveopensolaris)

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