From owner-freebsd-hackers@freebsd.org  Fri Mar 18 07:48:04 2016
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Date: Fri, 18 Mar 2016 03:48:00 -0400 (EDT)
From: Yao Bao <by@reorigin.com>
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To: freebsd-hackers@freebsd.org
Subject: Yes, it is!
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Thanks Matthew,

It works with -k option! The $BLOCKSIZE env is the root cause.

by