I don't speak your language but I make out that you are looking for the
driver for a Xetec external ST506 HDD which is no longer booting?
http://www.l8r.net/install/hdc.html
You will need to find a way to make an Amiga disk from that DMS archive,
maybe somneone can do that for you and post the disk.
Google translator gave a translation which is pretty understandable :)
You had better translate that into Italian then, so the OP understands what
he needs to do in future when he posts to an international but
predominantly English speaking group.
Looks like my interpretation was pretty reasonable anyway.
>>> Ok, che programma posso usare in Windows per aprire il file con
estensione DMS ?
grazie