so as a conclusion: never copy the GBD file but always do a backup restore ? right?

but now i thing that if the engine write from the beginning to the end by block, i thing even copying the GBD must be ok

--- In firebird-support@yahoogroups.com, "Ann W. Harrison" <aharrison@...> wrote:
>
> svanderclock wrote:
> > Hello,
> >
> > as i heard, when the page size is 8192 it's better to have the disk allocaton unit size to 8192 (it's make sense). but i m suspicious to know if every firebird page of 8192 will go EXACTLY in one disk allocation unit size of 8192 ? because the system don't know where in our GDB the pagesize are to put every of them on one cluster ...
> >
> > for exemple when we manually copy the database on the hard drive, how to be sure that every page will fit one disk allocation unit size ? same when we do a backup and restore ...
>
> I can't speak for copying database files, but the engine always
> writes page sized blocks which should cause the file system to
> align them.
>
>
> Cheers,
>
> Ann
>