Very low disk performance Highpoint 1820a

[Petri Helenius]

Arne WXrner wrote:

>--- Petri Helenius <pete at he.iki.fi> wrote:
>  
>
>>Eric Anderson wrote:
>>I'm seeing similar sequential performance on RELENG_5_3 and
>>RELENG_5_4 
>>on dual-Xeons using 3ware controllers so it does not seem to be
>>a driver issue [...]
>>
>>    
>>
>Why?
>
>I can remember, that some people said some months before, that
>FreeBSD's R4 was much faster (maybe something in the kernel
>changed due to SMPng, so that the disc subsystem behaves funny?).
>  
>
I mean the issue does not seem to be specific to a controller, but 
generic in the way how kernel schedules requests.

Pete