Following up on this post from earlier this year ...

Seagate Technology LLC hopes its new security system for the hard drive will become the most formidable barrier between computer data and thieves.

The world's largest hard drive maker says its DriveTrust Technology, to be announced Monday, automatically encrypts every bit of data stored on the hard drive and requires users to have a key, or password, before being able to access the disk drive.

... and on this IBM press release from last month, about their encrypting tape drive.