Dear Maintainer! The problem, as I worked out, is an old-known problem about udev, where the boot parameter "libata.atapi_passthru16=0" has to be set explicitly for some hardware .
For further details see: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=622340 https://bugzilla.redhat.com/show_bug.cgi?id=684599
