Readynas DUO (V1) Network speed over gigabit network running at 10Mbit (help!)

Question

Hi, I've been searching on and off for over a week for a solution to this problem.

My DOU v1 (old but still serving the purpose) is connected to a trust gigabit switch. It has a 1TB seagate drive and a 2Tb seagate (running as a 1 obviously) The 1TB is listed on the original approved hardware list.

Until recently this setup was working brilliantly. I was able to transfer files, usualy via ftp at over 20Mb/s confirming that a gigbit connection was working. Now, I'm lucky to get 1.2 MB/s, sometimes 1.4 or 1.5. I generally get 800 KBit/s or so.

I've changed the CAT 6 cable for another CAT 5e with no joy. I've connected 2 laptops with the same cables to the switch and transferred large files at 100's MB/s confirming the switch is "fine". Frontview reports a gigabit full duplex connection with jumbo frames enabled and the default MTU.

I've connected the DUO directly to one of the laptops and seen exactly the same speed issue. So all in all it seems the NAS itself is the problem. I've even removed the 2Tb drive and run it using the approved drive only, and seen no change.

I'm out of ideas and worried it's the DUO network port itself thats the problem. Everything else seems fine, so if anyone can offer some suggestions I'd appreciate it. I've scoured google and the forums and read plenty about MTU values and cables and tested everything I can. Lastly, the error logs show 0 errors for everything but the TCP Retransmits. Which is very high (I havn't got access to the real value right now) so I'm guessing that points to the real error - but I have no idea what, with limited knowledge of networking. Perhaps that's enough for someone with the know-how to say "it's obvious, that means...etc etc" !

Many thanks

Mike

StephenB · Answer

What firmware are you running?
&nbsp;
It's possible that the duo's ethernet NIC is simply failing. &nbsp;Hopefully not.
&nbsp;
Were you always using jumbo frames? &nbsp;Also is the speed issue in both directions, or only one?
&nbsp;
Also, failing disks will also kill performance, so you should look at the disk health for the drives.
&nbsp;
Though you've likely already tried this... &nbsp;Reboot the duo if you haven't already done that.
&nbsp;

M_J · Answer

Thanks for a swift reply!&nbsp;I'm running Radiator 4.1.15 ( I was on 4.1.13, noticed the slow down and then updated a few days ago).&nbsp;I started using jumbo frames when I first plugged into the gigabit switch, around 18 months ago. Which seemed to work very well indeed.&nbsp; The speed issue affects both directions, although tranferring from NAS to PC is slightly quicker, around 1.2 Mbytes/s vs 850Kb/s from PC to NAS, in the test I just performed using a 29.6 Mb mov file.&nbsp; This is over FTP again by the way.&nbsp; Via ethernet, over the switch.&nbsp;I've been restarting the DUO almost every time I start testing theories, and I just started it now to do the test above.&nbsp; The network logs showed 0 errors before the test and after the test I can now see :&nbsp;TCP Retransmits 7Unrecovered TCP Retransmits 4&nbsp;- besides that, all seems perfectly well.&nbsp;Checking the disk health in the SMART+ window shows 0 errors for both drives.&nbsp; I'd feel better if I did actually see some errors I think!&nbsp; Perhaps there's a more effective way I can diagnose disk health?&nbsp; Or indeed the network port health.&nbsp;Thanks again,&nbsp;Mike

StephenB · Answer

If the PC runs windows can you try testing with NASTester (using CIFS). &nbsp;There's a download here:&nbsp;http://www.808.dk/?code-csharp-nas-performance

M_J · Answer

Hi, I managed to get back on to this tonight.&nbsp;I ran the nastest and had some interesting results.&nbsp;Running a 400MB file write on N: 5 times...Iteration 1: 1.84 MB/secIteration 2: 1.77 MB/secIteration 3: 1.56 MB/secIteration 4: 1.80 MB/secIteration 5: 1.66 MB/sec-----------------------------Average (W): 1.73 MB/sec-----------------------------Running a 400MB file read on N: 5 times...Iteration 1: 19.74 MB/secIteration 2: 19.86 MB/secIteration 3: 19.85 MB/secIteration 4: 19.64 MB/secIteration 5: 19.66 MB/sec-----------------------------Average (R): 19.75 MB/sec-----------------------------&nbsp;The write is very low but the read is back up. &nbsp;More interestingly however is that I then tried another ftp test, on the same laptop but now from within windows. &nbsp;It's a dual boot machine, running Linux usualy.&nbsp;In Win7 mode the ftp speeds for writting to the NAS were anywhere from 5 Mb/s to over 10 Mb/s, which is great, but the read was fluctuating around 100 Mb/s ! So the great news is the NAS must be fine.&nbsp;I then tried another laptop, running Vista that transfers at full speed except when ftp'ing to the DUO. &nbsp;This demonstrated the previous slow speeds. &nbsp;I don't fully understand how ftp speeds could be different between Win7/Vista and Linux but there it is.&nbsp;At least I'm now looking at a software issue which makes me much happier, so thanks for helping me narrow it down !

StephenB · Answer

Odd results, certainly the NASTester write speeds should be faster.
&nbsp;
Let us know if you discover anything else.

Forum Discussion

Readynas DUO (V1) Network speed over gigabit network running at 10Mbit (help!)

5 Replies

Related Content

Readynas Ultra 6 Network issues??

CM3000 and Xfinity Gigabit x2

network

10 Gigabit switch for RN526x SMB network

Readynas Disappeared from network

NETGEAR Academy

ProSupport for Business