--- Comment #57 from ---
Well, I did do dd test, but they only write on a filesystem.

It was (back then) most likely on ZFS, with compression etc. that changed the
Esp. if I just write zeros from /dev/null.

That's why I switched to dc3dd because it does the same thing on Linux and on
FreeBSD and completely eliminates the filesystem (and caching) layer as well as
any other kinds of write-optimization.

I've now created an empty UFS filesystem on my 50G volume and run unixbench on

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