2012-01-08 18:56, Edward Ned Harvey wrote:
From: Richard Elling [mailto:richard.ell...@gmail.com]
Disagree. My data, and the vendor specs, continue to show different
media bandwidth speed for inner vs outer cylinders.

Any reference?

Well, Richard's data matches mine with tests of my HDDs
at home: I read in some 10-gb blocks at different offsets
(dd > /dev/null), and "linear" speeds dropped from about
150MBps to about 80-100MBps.

This was tested on a relatively modern 2TB Seagate drive.

Random IOs are still crappy on mechanical drives, often
under 10MBps ;)

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