GEOM oddity with verbose boot

[Wiktor Niesiobedzki]

On Fri, Dec 19, 2003 at 01:31:31PM +0100, Poul-Henning Kamp wrote:
> In message <20031219122146.GA3682 at mail.evip.pl>, Wiktor Niesiobedzki writes:
> 
> >Just an observation:
> >When I boot in verbose mode I get:
> >GEOM: Configure ad6s1, start 32256 length 80026329600 end 80026361855
> >GEOM: Configure ad6s1a, start 0 length 1073741824 end 1073741823
> >GEOM: Configure ad6s1b, start 1073741824 length 1073741824 end 2147483647
> >GEOM: Configure ad6s1c, start 0 length 80026329600 end 80026329599
> >GEOM: Configure ad6s1d, start 2147483648 length 21474836480 end 23622320127
> >GEOM: Configure ad6s1e, start 23622320128 length 56404009472 end 80026329599
> >GEOM: Configure ad6s1da, start 8192 length 80026321408 end 80026329599
> >GEOM: Configure ad6s1db, start 1073741824 length 1073741824 end 2147483647
> >GEOM: Configure ad6s1dc, start 0 length 80026329600 end 80026329599
> >GEOM: Configure ad6s1dd, start 0 length 1073741824 end 1073741823
> >GEOM: Configure ad6s1de, start 2147483648 length 21474836480 end 23622320127
> >
> >Entries for ad6s1d* are the suspicous one.
> 
> You seem to have (most of) a valid BSD label in your ad6s1d parition.
> 
> Try 
> 	bsdlabel ad6s1d
> 
> I'm pretty sure it finds a label for you. 
Ofcourse, it finds, but what makes me worry, is how there could be a valid bsd
label, if there is a valid UFS2 superblock?
If I understand correctly, in first 8192 bytes of partition are at the same
time:
- UFS2 superblock
- BSD label

Is that just a coincidence? Should it be possible?


Cheers,

Wiktor Niesiobedzki