Re: IDE throughput in 2.6 - it's good!

[Timothy Miller]

Ken Moffat wrote:

> So, despite the numbers shown by hdparm looking worse, when only one
> user is doing anything the performance is actually improved.  I've no
> idea which changes have achieved this, but thanks to whoever were
> involved.


I've done tests using dd to and from the raw block device under 2.4 and 
2.6.  Memory size (kernel boot param mem=) doesn't seem to affect 
performance, so I assume that means that dd to and from the raw block 
device is unbuffered.  When I compare read and write speeds between 2.4 
and 2.6, 2.6 is definately slower.  The last 2.6 kernel I tried this 
with is 2.6.5.

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