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From: David Magda <dmagda@ee.ryerson.ca>
To: Daniel Braniss <danny@cs.huji.ac.il>
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Cc: FreeBSD Stable <freebsd-stable@freebsd.org>
Subject: Re: unable to pwd in ZFS snapshot 
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On Dec 26, 2010, at 06:32, Daniel Braniss wrote:

> btw, why use rsync if 'zfs send| zfs recv' work realy nice?

You're assuming that both sides of the transmission are on ZFS, which  
is not always true.

It may be that the FreeBSD/ZFS system is the "back up server" for a  
network of Linux machines, and so is the destination of the rsync job.  
It may be that the destination is Linux or AIX or HP-UX.