Erm . . . Storable doesn't create Berkeley DB files; Storable uses its own on-disk format. If you're moving Storable-serialized data between machines of different endian-ness you want to look at the nstore routine which writes out stored data in a portable ("network") byte ordering that will behave correctly anywhere.

What you probably want is to write a conversion script on the old platform which reads in the current files and writes out (again, using nstore) a new portable copy. Then move those new portable copies to the new platform.