modify existing partitions - newbie

[Jerry McAllister]

> 
> > >   # "raw" part, don't edit
> > >   d: 41943040 41943040    4.2BSD     2048 16384
> > 28552
> > > 
> > > Is it the correct way to delete the partitions?
> > 
> > First guess is not having permission.   
> > It should be done in single user mode.
> > 
> > Second guess is the partition you want to delete is
> > mounted.
> > 
> > I have never tried to modify partitions on the disk
> > with root on it, 
> > so maybe that presents special problems.   You may
> > need to boot
> > from something else - live CD for example.
> > 
> 
> Now I tried to create new partitions on the free space
> of the existing slice in single mode, but I am getting
> the same error as 'unable to write data on ad0' . I am
> doing this in root user only. What are all the
> permissions should I have for this? 
> 
> Or please suggest me to create a partition in another
> way?

As I say, I have never tried to modify partitions on the root/boot
disk currently being used.  I suspect that, since the root partition
of that disk is mounted, you will not be able to write in the label
even for other not-currently mounted partitions on that disk.

You may have to boot from some other device, either another disk
or a live CD or fixit floppy in order to work on that particular 
disk label.     

Maybe someone else on the list knows for sure.j

////jerry

> 
> Sarav
>