Id agree with >NIL:'s regarding how closly kept HDD firmware typically is
the few exceptions being fairly well know fixes for defective products
such as (for posterity)
the IBM Deathstar
http://www-1.ibm.com/support/docview.ws ... MIGR-44195
(firmware links for various models at the bottom)
this (cache) describes the issue
as well as
this link (in German) describing physical issues
all of which can be found at the
Storage Review Deathstar FAQ