On Fri, Mar 27, 2009 at 07:05:00AM -0400, Kenneth R Westerback wrote:
> On Thu, Mar 26, 2009 at 11:17:27PM -0400, Nick Guenther wrote:
> > So then does 'fdisk -u' also install a disklabel [to sector 0 of the
> > disk]? That surprises me, I'd think that disklabel would be for that,
> > and the man pages don't explain what is going on.
> >
> > -Nick
> >
> > On 26/03/2009, Brynet <[email protected]> wrote:
> > > Jesus(?) wrote:
> > >> The question is: What's the mainly difference between 'update' and
> > >> 'write'
> > >> on fdisk program?
> > >
> > > The 'update' command, or.. the -u option.. updates the
> > > MBR(/usr/mdec/mbr) boot program without changing the partition table.
> > > The 'write' command commits the partition table to disk.
> > >
> > > You may want to read fdisk(8) again.
> > >
> > > -Brynet
>
> fdisk doesn't write a disklabel to disk, but a valid MBR is read
> by the disklabel program and when it finds an OpenBSD MBR partition
> it uses the info from that MBR partition to set up its initial limits.
Also, the MBR info might be used to spoof a disklabel when none is
found on the disk.
-Otto
