Slow read from PE6850/PERC4/DC

[Baird, Josh]

It's running the latest firmware -- 352D.

-----Original Message-----
From: linux-poweredge-bounces at dell.com
[mailto:linux-poweredge-bounces at dell.com] On Behalf Of John LLOYD
Sent: Tuesday, May 19, 2009 11:14 AM
To: linux-poweredge at dell.com
Subject: RE: Slow read from PE6850/PERC4/DC

 

> 49MB/sec (and its sometimes lower) seems a bit too slow.  I 
> am able to get
> ~150MB/sec on similar hardware (with a PERC5).  This is a RHEL5.3 x64
> machine running the Xen kernel on an EXT3 filesystem.  
> Anybody have any
> ideas why it is so slow?
> 


Firmware version.  An upgrade available for PERC5 and PERC6 has made
significant differences on all levels of RAID.

Or the PERC4 simply cannot keep up?


--John



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