I need some swap partion help on new 10.1 install

[Chris H]

On Tue, 6 Jan 2015 09:56:24 -0600 Bob Willcox <bob at immure.com> wrote

> On Mon, Jan 05, 2015 at 08:11:27PM -0800, Kevin Oberman wrote:
> > On Mon, Jan 5, 2015 at 7:04 PM, Warren Block <wblock at wonkity.com> wrote:
> > 
> > > On Mon, 5 Jan 2015, Bob Willcox wrote:
> > >
> > >  On Sun, Jan 04, 2015 at 06:37:18PM -0700, Warren Block wrote:
> > >>
> > >>> On Sat, 3 Jan 2015, Michael Butler wrote:
> > >>>
> > >>>  On 01/03/15 19:35, Kevin Oberman wrote:
> > >>>>
> > >>>> [ .. snip .. ]
> > >>>>
> > >>>>  As per an earlier suggestion, did you put:
> > >>>>>  kern.geom.label.gpt.enable=0
> > >>>>> into /boot/loader.conf? If so, that's why you lack a /dev/gpt label.
> > >>>>> This
> > >>>>> is usually a "friendlier" string than the diskid, but both work
> > >>>>> equally well.
> > >>>>>
> > >>>>
> > >>>> bsdinstall does that on its own - you have to manually
> > >>>> remove/comment/set to "1" after installation :-(
> > >>>>
> > >>>
> > >>> gpt, or gptid?  The first would be a terrible regression, the second,
> > >>> not so much.
> > >>>
> > >>
> > >> The more I read of this thread the more confused I get. What should I
> > >> have in
> > >> /boot/loader.conf to get the old behavior with more traditional device
> > >> names?
> > >>
> > >> Also, if bsdinstall doesn't do this for me automatically, why did it put
> > >> /dev/ada0p2 in the fstab for swap?
> > >>
> > >
> > > The best way is to use GPT labels, which are stored in the GPT header.
> > > They are portable, so keep working if the drive device name changes (ada0
> > > to da1, say).
> > >
> > > GPT labels can be set with gpart modify.  The labels appear in /dev/gpt/.
> > > As mentioned before, they might not appear if a partition is mounted due
> > > to GEOM "withering".
> > >
> > > GPT labels are enabled by default.  If bsdinstall is disabling them, it
> > > is a regression.
> > >
> > > GPT IDs, on the other hand, are a unique generated ID code that can
> > > appear at the same time.  Many of us find them not very useful and
> > > disable them in loader.conf.
> > >
> > > I have only upgraded systems to 10.1, so don't know what bsdinstall does
> > > on a new install.
> > >
> > 
> > Just checked head and bsdinstall does not disable GPT labels. It does
> > disable gptid labels (which IMHO is a good thing).
> 
> So, what should I put in /boot/loader.conf? Can I enable both GPT and GPT IDs
> with this:
> 
> kern.geom.label.gpt.enable="1"
> kern.geom.label.gptid.enable="1"
Adding the 2 above will give you both. Adding both will not result
in any harm. But *do* remove the quotes from the value; as they
aren't required/desired (in this case).

issuing sysctl kern.geom.label.gptid.enable=1
will return
kern.geom.label.gptid.enable=0 -> 1
if it was previously UNet (0)
Same applies to kern.geom.label.gpt.enable

Simply issuing
sysctl kern.geom.label.gpt.enable
will return it's *current* value.
Same applies to kern.geom.label.gptid.enable, or any other
setting.

HTH

--Chris
> 
> And if I do, should I expect any problems with doing that?
> 
> Bob
> 
> 
> > --
> > R. Kevin Oberman, Network Engineer, Retired
> > E-mail: rkoberman at gmail.com
> 
> -- 
> Bob Willcox    | Men who cherish for women the highest
> bob at immure.com | respect are seldom popular with them.
> Austin, TX     |         -- Joseph Addison
> 
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