On Sun, Nov 19, 2006 at 10:18:06PM +0000, David Laight wrote:
> On Mon, Nov 20, 2006 at 06:49:42AM +0900, Henry Nelson wrote:
> > > > >  d:    392000    522480     4.2BSD   1024  8192 39200 
> > > >                                                   ^^^^^
> > > > How do you calculate "cpg/sgs"?  TIA
> > > 
> > > By taking the bottom 16 bits of number of fragments in a 'cylinder group'.
> > 
> > I don't know what that means.  Perhaps an example, please?
> 
> 'cpg' stand for cylinders per group, and is (was) the size of a cylinder
> group.  Recent changes to the way newfs works mean that 'cylinder groups'
> are no longer aligned on cylinder boundaries! so someone but the cylinder

I really think I need to start a new thread on another list, maybe "help"?

I don't see how the setting of "cpg/sgs" in the disklabel can be
a good situation if the value depends on "the way newfs works".  The
newfs command is run after the disk has been labeled.

So when creating a new disklabel, set "cpg/sgs" to "0"?  There really
needs to be something about this in the man page for disklabel(8),
because when creating a new label all the information one has at hand
is what the probe shows in dmesg and specs from the manufacturer.

-- 
henry nelson
  WWW_HOME=http://yuba(dot)ne(dot)jp/(tilde)home/