I'm looking for a way to have an IRIS db distributed over several (hw) drives.   Without touching the internal data structures (e.g. mapping) !   Are there any options in file systems to achieve this "splitting" or "appending" ?  Historic background: * Once upon a time CPUs worked on 32 bit * Files could mostly not be larger than 2 GB * And Caché had a (forgotten) option to EXTEND a db to a next file of another 2 GB max. and a next ... This EXTENT was excellently suited to move fresh and active data
to a faster spindle for more performance.
  `<span style="oolor:#00ff00"><i>[ oh dear!<br>  Spindles are gone meanwhile with SSD and Virtual Storage Arrays<br>  they only survived in museums and old fairy tales to sleep 100 years ] </i></span>`