mirror without destroying existing contents

[John Nielsen]

On Friday 16 March 2007 15:48, Steve Franks wrote:
> On 3/16/07, John Nielsen <lists at jnielsen.net> wrote:
> > On Friday 16 March 2007 11:18, Steve Franks wrote:
> > > I get the following:
> > >
> > > #gmirror label -v -b split -s 1024 data ad0
> > > can't store metadata on ad0: operation not permitted.
> >
> > That most likely means that you currently have a filesystem on ad0
> > mounted. If that's the case you should be glad that the OS was smarter
> > than you. What steps had you taken prior to this?
>
> It appears to say in the manpage that you can do this on a disk with
> an existing filesys - would you expect it to work if the disk is
> unmounted first, then?
>
> Steve
>
> man gmirror:
> "Create a mirror on disk with valid data (note that the last sector of the
>      disk will be overwritten).  Add another disk to this mirror, so it
> will be synchronized with existing disk:
>
> 	   gmirror label -v -b round-robin data da0
> 	   gmirror insert data da1
> "

I would expect it to, yes.

JN