Hard drive performance

Tino Schwarze linux-poweredge.lists at tisc.de
Mon Mar 2 16:31:17 CST 2009


On Mon, Mar 02, 2009 at 01:56:36PM -0800, Michael Scully wrote:

>                I usually order Dell servers with 15K speed SAS drives and
> RAID 5  Perc controllers.  They have been quite solid performers.  I
> purchased a pair of servers with lower volume requirements I got in the past
> year, where I just went with mirrored SATA 7200 drives, to keep down the
> cost.  They work fine for everyday use.  But for anything where massive
> writes take place, the drive system comes to almost a standstill.  It hits
> me on data conversions or mass updates to the indexed files we have on them.
> Both of these are RHEL 5 systems.
> 
>                Has anyone had similar experiences with PE840's?  Were there
> any driver or firmware changes that improved performance in this area?  Both
> of these were acquired around the April/May 2008 timeframe.

I've got a similar machine here, IIRC a PE860 with two SATA drives. And
it really sucks at I/O. It's running OpenSuSE 10.2 and has the latest
kernel drivers for the SAS controller. IIRC, it should have the latest
firmware, too.

Sorry, no useful hints from me...

Bye,

Tino.

-- 
"What we nourish flourishes." - "Was wir nähren erblüht."

www.lichtkreis-chemnitz.de
www.craniosacralzentrum.de



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