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
sequential
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 ;)

//Jim
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