The four disks are Seagate ST318305LC, and there are two Adaptec 39160
controllers, with two disks attached to each.  The machine is a Dell
PowerEdge 4400.

I've been able to achieve 80 MB/s sequential writes by manually striping
across the four disks with a test program, but combining them into a RAID
array greatly reduces the throughput.

Thanks,

Timothy E. Denehy



On Fri, 25 Jan 2002, Manuel Bouyer wrote:

> On Thu, Jan 24, 2002 at 04:14:35PM -0600, Timothy E. Denehy wrote:
> > 
> > I have a 4 disk RAID 0 array in which each disk runs at approximately 20
> > MB/s.  I've tried a number of different configurations (changing both
> > stripe unit and block size), but the maximum sequential write throughput I
> > can get from the array is only 31 MB/s.  Could I be doing something wrong,
> > or is this just a raidframe limitation?  My best configuration is listed
> > below.
> 
> What kind of disks and controllers ?
> 
> -- 
> Manuel Bouyer <bouyer@antioche.eu.org>
> --
>