GEOM oddity with verbose boot

Poul-Henning Kamp phk at phk.freebsd.dk
Fri Dec 19 05:06:51 PST 2003


In message <20031219125316.GB3682 at mail.evip.pl>, Wiktor Niesiobedzki writes:

>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

The UFS2 superblock can be located four different places, at 0, at
8k, 64k or 256k into the partition.

The BSDlabel is at 512 bytes offset (on i386).

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.


More information about the freebsd-current mailing list