Expected speed for DSS setup

[beng]

I tryed iozone over NFS over GbE and I got about 90MB/s in the best reads.
.......
which indicates over 100MB/s in over NFS

But I expected above 500MB/s from the disk and controller specs..

Megabits (Mb/s) or Megabytes(MB/s)?

If the Hitachi 7K1000 can get about 80MB/s, then 100MB/s in Raid5 is not too shabby....
So I am not sure why you thought you would get even 500Mbit/s...


I agree though that it would be nice to to have a Util on the DSS that could test the raw I/O performance.

Kurt,
What are the servers you are connecting to the NAS with?

If you are running Windows try using the Intel NAS Perf tester:
http://www.intel.com/design/servers/...rf_Toolkit.htm

And if you want to test your GB Network, take a look at netspeed.exe from OptimumX
http://www.optimumx.com/download/
(Assuming you have another Windows Box to test against.)

So far I think almost all of our speed issues we have narrowed down to the server NICs not auto negotiating properly.

Rgds Ben

[Kurthh]

Kurt,
What are the servers you are connecting to the NAS with?

If you are running Windows try using the Intel NAS Perf tester:
http://www.intel.com/design/servers/...rf_Toolkit.htm

And if you want to test your GB Network, take a look at netspeed.exe from OptimumX
http://www.optimumx.com/download/
(Assuming you have another Windows Box to test against.)

So far I think almost all of our speed issues we have narrowed down to the server NICs not auto negotiating properly.

Rgds Ben

Thanks.
Think i have located the problem. The problem was located to the Areca 1261ML controller and/or the memory ( 2 GB ) on the Areca controller.

Tested this by making a software raid directly connected to the motherboard ( Supermicro X7DWE )

Works fine now. Transfering several 2 Gigabyte files give an average writespeed to the software raid-0 at 460 Mb/s ( 56 MB/s). This over a 1 gb line connected directly with twisted-pair.

Is that a reasonable speed. Else, i will try thos tools. The graphical speed charts i Open-E also works fine i think.

Kurt H