gpart, glabel and newfs --> what am I doing wrong
Warren Block
wblock at wonkity.com
Sun Jan 13 15:45:34 UTC 2013
On Sun, 13 Jan 2013, Warren Block wrote:
> On Sun, 13 Jan 2013, kpneal at pobox.com wrote:
>
>> On Sun, Jan 13, 2013 at 08:09:00AM +0700, Erich Dollansky wrote:
>>> For what is glabel then still good?
>>
>> It is still useful for partition schemes that don't have labels (eg, MBR)
>> AND the filesystem used doesn't support labels itself AND the end of the
>> partition does not get touched by the filesystem.
>
> But it doesn't matter what the filesystem does. Access to the last block is
> not allowed by the label device. The filesystem does not even see it. See
> my reply in -fs:
> http://lists.freebsd.org/pipermail/freebsd-fs/2013-January/016113.html
Sorry, forgot to mention that one possible use for glabel is to label a
swap partition on an MBR drive.
# glabel label myswap /dev/ada0s1b
And then in /etc/fstab:
/dev/label/myswap none swap sw 0 0
One block is used for metadata at the end of ada0s1b, but it's safe from
overwriting because /dev/label/myswap does not include that block.
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