has a great reliability index for the HDDs. It's worth the free sign up (and participation) if you're really interested.
Just because the HDD manufacturers are coming out with 2.5" enterprise drives, it does not make them mobile drives. These drives are for use with servers who are after lower power requirements, and faster data acquisition (more spindles of smaller disks means quicker access).
Sorry to burst any Notebooker's bubbles.
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