New Disk-Lubricating Process Could Bring 1-Terabyte Laptops

Researchers at Seagate Technology acknowledge such levels of storage on 
small, commercial products are still between five years and a decade 
into the future, but they feel confident they've hit on a way to 
overcome a major limitation in disk manufacturing and capacity.

http://www.informationweek.com/story/showArticle.jhtml?articleID=190900831&cid=RSSfeed_IWK_All

By Ted Kemp
InformationWeek

Jul 24, 2006 12:00 AM

And you thought your iPod had amazing storage capacity! A disc drive 
manufacturer has patented a process that may bring about computer hard 
drives and handheld devices that can store as much as a terabyte of 
information.

Researchers at Seagate Technology acknowledge that such levels of 
storage on small, commercial products are still five years to a decade 
away, but they feel confident they've hit on a way to overcome a major 
limitation in disk manufacturing and capacity.

Smaller bits on a disk's magnetized surface mean more of them can be 
packed together, which in turn yields more storage. But it also 
generates greater heat when a disk is being written to, which can 
demagnetize bits, rendering them useless. A lubricating layer protects 
the storage media during normal operations, but heat can also wear away 
this layer.

Seagate's patent describes a process called heat-assisted magnetic 
recording, known as HAMR, which involves adding a reservoir to disk 
casings that contains nanotube-based lubricant molecules. That lubricant 
is released as needed to replace portions of a disk's lubricating layer 
that are stripped away by heat over time.

HAMR will boost disk capacity by a factor of at least 10 over the 
current state of the art in writing data to disks, Seagate chief 
technical officer Mark Kryder says. The result could be computers, PDAs, 
and even cell phones equipped with 3.5-inch drives that can store a 
terabyte of data or more.



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