Two heads are more secure than one?

According to this article over at PC World, a Japanese company is developing a hard drive with two heads.
Scarabs put two heads on the hard disk, a read-only head that is connected via one cable to a Web server for people to browse content on the disk file and a read/write head that is connected by another cable to a PC for administrators who renew the data. Internet users have access to the disk file only through the read-only head and so there is no physical way they can go into the system and rewrite the data.
It's not a completely new or perfect idea, but it could go a long way towards preventing hackers from defacing static web content. Thanks to Slashdot for the tip.
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