Are there any utilities to do such a thing? Why don't these companies provide such a thing to users? Has anyone compiled and posted a public list of known-good firmware hashes for the major hard drive vendors and models? This seems to be a critical hole in PC security.
I did contact Seagate support asking for hashes of their latest firmware; I got a response stating that '...If you download the firmware directly from our website there is no risk on the file be tampered with." [their phrasing, not mine]. Methinks somebody hasn't been keeping up with world events lately."