diskid documentation

[Ryan Stone]

On Mon, Jun 2, 2014 at 9:26 AM, Allan Jude <allanjude at freebsd.org> wrote:
> It also tends to sometimes hide the gpt label provider on me (not sure
> in which cases it does this, but it is annoying)

This happens when something (e.g. zfs) happens to open the diskid
provider instead of the gpt label.  For me this ended up being a bit
more than annoying; my swap was mounted in /etc/fstab via a gpt label
so I silently lost my swap when I did an upgrade.