dd command: BSD analog of conv=fsync?

[Thomas Mueller]

What is the (Free)BSD counterpart of conv=fsync in dd command?

Command in question is

dd if=GNOME-3.6.0.iso of=/dev/DRIVE bs=8M conv=fsync

This is for writing to a USB stick, and of course DRIVE is replaced by the
actual device node; also I believe bs=8M, good for Linux, would be bs=8m in
FreeBSD.

I don't really know if "conv=fsync" is necessary, but that's what was advised
in the GNOME test-drive download page.

Do I need to build and install coreutils from ports?


Tom