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Date:      Wed, 16 Dec 2015 20:42:44 -0700 (MST)
From:      Warren Block <wblock@wonkity.com>
To:        Anton Sayetsky <vsasjason@gmail.com>
Cc:        Adam Vande More <amvandemore@gmail.com>, Sergei G <sergeig.public@gmail.com>, FreeBSD Questions <freebsd-questions@freebsd.org>
Subject:   Re: which label to use in mount?
Message-ID:  <alpine.BSF.2.20.1512162038540.36091@wonkity.com>
In-Reply-To: <CAA2O=b_AFe+kuyE=6kvMR9rCm-Yz+GjOVefz5zqPSR0aprM11Q@mail.gmail.com>
References:  <CAFLLzCMQtupZX651wR35vrJdXY5Ber8qKPd+5EX4Dkp4iCv=vg@mail.gmail.com> <CA+tpaK3yfkNk0haQ3Ogbc920Go4HUFaik=tWtqyNtsDmJynKLg@mail.gmail.com> <CAA2O=b_AFe+kuyE=6kvMR9rCm-Yz+GjOVefz5zqPSR0aprM11Q@mail.gmail.com>

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On Wed, 16 Dec 2015, Anton Sayetsky wrote:

> Labels are used when one wants to be independent of disk names and
> partitions numbers. GPT has native support for labels, thus independent of
> filesystem or partition types. GPT labels are also not consuming space on
> disk because that space already reserved. So if you'll make 200-sectors
> partition and label it - you'll get 200 sectors available.
> UFS labels stored in last sector of block device so consuming space.

This is true of generic labels, but I'm fairly sure that UFS label 
information is stored in filesystem metadata and takes no additional 
space.

If a whole GPT partition is used for a single filesystem, either the GPT 
label or the UFS label should work identically.



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