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...



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


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