August 2011
Intermediate to advanced
312 pages
12h 13m
English
Content preview from Digital Storage in Consumer Electronics
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Fundamentals of Hard Disk Drives 49
www.newnespress.com
At the same time that areal density has increased so dramatically (say 6,000 times over
the last 15 years), the time it takes to get to data on the disk drive has increased. The
time to data on a hard disk drive is a function of the linear density of data on the hard
disk drive tracks, the rotational speed (RPM) of the disk, and the layout of data on the
hard disk drive.
Hard disk drives are also increasing in reliability due to several factors. As the average
form factor decreases, the mass of the hard disk drive decreases and inertial shock is
less signifi cant. Smaller drives also are ...
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