On Tue, Feb 01, 2011 at 04:05:23PM -0600, Stan Hoeppner wrote:

Jon Nelson put forth on 2/1/2011 7:50 AM:

quoted

The performance will not be the same because. Whenever possible, md
reads from the outermost portion of the disk -- theoretically the
fastest portion of the disk (by 2 or 3 times as much as the inner
tracks) -- and in this way raid10,f2 can actually be faster than
raid0.

Faster in what regard?  I assume you mean purely sequential read, and not random
IOPS.  The access patterns of the vast majority of workloads are random, so I
don't see much real world benefit, if what you say is correct.  This might
benefit MythTV or similar niche streaming apps.

It is mostly interesting for workstations, where one user is the sole
user of the system

But it is also interesting for a server, where the client is interested
in the completion time for a single request. The faster processing of 
a sequential reads is significant, as far as I can tell.

Best regards
keld