Re: union-mounting mfs

[Frank Wille <frank%hasenbraten.de@localhost>]

On Mon, 4 Aug 2008 20:24:34 -0700
Bill Stouder-Studenmund <wrstuden%netbsd.org@localhost> wrote:

> > # mount_cd9660 /dev/cd0a /cdrom
> > # mount_mfs -o union -s 32m test_mfs /cdrom/i386
> > # cp /netbsd /cdrom/i386/
> > # cp /netbsd /cdrom/i386/binary/kernel/
> > cp: /cdrom/i386/binary/kernel/netbsd: Read-only file system
> > 
> > The first cp works, the second doesn't, because it bypasses the
> > mfs! Why?
> 
> Because that's how -o union works. It only applies to the top-level 
> directory.

I see. Too bad. Would have been a very useful option otherwise.

-- 
Frank Wille