Thank everybody.
I will use nbackup for lock the database and then copy it using rsync.

--- In firebird-support@yahoogroups.com, Hannes Streicher <hstreicher@...> wrote:
>
> Hello Christian,
>
>
>
> >> NO , data keep in Memory may not be flushed out to disk yet ,
> >> or still halfway thru
>
> > But I have forced writes on, doesn't firebird flush writes when
> > commit to have consistent transactions writed to disk?
> > I was thinking that LVM is aware of consistent writes (if firebird forced writes is on)
>
> i would not bet my data on that
>
>
> there are two right ways to do it
>
> a) backup, copy Back , and restore on the other end
>
> b) use replication
> look for ib replicator or fb replicator
>
>
> --
> Mit freundlichen Grüssen
> Hannes Streicher mailto:HStreicher@...
>