For an analogy of how densely HAMR technology can pack data bits together, Seagate looked to the Milky Way, saying the technology can already store more bits per square inch than there are stars in the galaxy. It's estimated there are as many as 400 billion stars in the Milky Way.
Just as PMR had its challenges with overcoming disruptions caused by bit magnetization years ago, HAMR technology also faces significant hurdles. As drive manufacturers pack more bits per square inch on the surface of a disk platter, they also tighten the data tracks, the concentric circles on the disk's surface that anchor the bits. The challenge as those tracks tighten is overcoming magnetic disruption between the bits of data, which causes the superparamagnetic effect, causing bits to flip their magnetic poles resulting in data errors.
Lucas Mearian covers storage, disaster recovery and business continuity, financial services infrastructure and health care IT for Computerworld. Follow Lucas on Twitter at @lucasmearian or subscribe to Lucas's RSS feed . His e-mail address is email@example.com .
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