> Is it possible to create a database with say 10x more space than it's
> must mormally use ? (now the hard drive are soo big, that it's not
> realy matter the file size)
>
> this to prevent file fragmentation

Create table, fill it with lot of data (e.g. using loop in Execute Block), drop it.

Or on Windows you can change file size using
SetFilePointer and SetEndOfFile

Ivan
http://www.volny.cz/iprenosil/interbase/