Complex sentence: Current models are available from 40GB to 500GB capacities, with rotational speeds ranging from 3600RPM to 7200RPM, in 1.8 "or 2.5" form factor, with PATA or SATA interface.
Split into simpler sentences: Current models are manufactured with capacities ranging from 40GB to 500GB, with rotational speeds ranging from 3600RPM to 7200RPM. Currently they are available in 1.8 "or 2.5" form factor, using either the PATA or SATA interface.