Many Networkerrors + Netgear Readynas duo hangs

MathijsKosters wrote:

Hi all, I've got the following problem: Yesterday I bought myself a new Readynas duo, so I installed it as in the manual. But when checked the webinterface (RAIDiator 4.1.8) works very very slow, loading a page costs about 5-10 seconds. When I checked the NetworkErrors in the RAIDiator I got plenty: 60 incorrect packages 40 TCP-retransmissions 10 Not-recovered TCP-retransmissions When I reseted the log and watched 10 minutes later I got about the same errors. But that's not the only thing. Sometimes when I write something to the NAS, the write-proces stops and the NAS becomes unreachable. What's wrong? Something in my router or something? I hope you can help me out! Greetings, Mathijs

Are you reading/writing data over wireless or 100 mbit ethernet? If so, you might need to enable 802.3x flow control. (There are other possibilities, including a bad cable or switch port.)

What router are you using?

I'm using a Ubee EVW3200 and it's over wifi on an mac. I've alreade replaced all cables, so that couldn't be the fault. What do you mean by switch port? I will at least try to enable 802.3x flow

btw. Where in my router can I enable the 802.3x flow? Can you give some more detailed information?

MathijsKosters wrote:
btw. Where in my router can I enable the 802.3x flow? Can you give some more detailed information?

In managed switches you can turn this on/off. Generally in routers and unmanaged switches it is hard-wired (on or off). I'm not seeing any manuals for your router on line (at least not on English sites), so I can't tell what your situation is. If you have a datasheet or manual, check the technical specs and see if 802.3x is listed.

I suggest that the next step is to connect your mac with ethernet and see if the stats improve. There are some other tweaks for WiFi (particularly MTU size), but before you go there you should get the basic wired network working reliably.

Thanks for your help so far. I've tried exactly the same with ethernet but that doesn't make any difference. How fast is the web interface normally? Do you have any other suggestions for me?

MathijsKosters wrote:
Thanks for your help so far. I've tried exactly the same with ethernet but that doesn't make any difference. How fast is the web interface normally? Do you have any other suggestions for me?

Frontview is pretty sluggish on the DUO - mine takes a few seconds to come up if the disks are spun up.

The best way to measure speed is to time a fairly large file transfer (something around 500 Mbyte - 1 Gbyte file), then you can measure the throughput. Test this separately in both directions (read times will be different from write). Maybe you should clear the network stats before the test, and record the network errors you get.

BTW, do you have jumbo frames enabled on the DUO? Is the MTU size set to the normal 1500 bytes? (Just asking, not suggesting any changes just yet).

Jumbo frames isn't enabled, MTU is set to 1500

I've done some speedtesting, and that's very interesting because wireless or ethernet makes a huge difference:

Wifi Jumbo frames on:

Read 5,66 mb/s
Write 3,85 mb/s

Wifi Jumbo frames off:

Read 5,57 mb/s
Write 4,44 mb/s

Ethernet Jumbo frames off:

read 13,17 mb/s
write 14,21 mb/s

So I posted earlier that there was no difference about ethernet and wifi, but that was only the webinterface. On writing and reading there is a huge difference between wifi and ethernet. BTW. I have reinstalled the Raidiator and now the webinterface takes 2-3 seconds to load a page, so that's pretty normal. Only the write/read speeds over wifi aren't normal. + the network errors continue to come.


So I think I have to change something in my wifi network. Do you have any suggestions?

Here are pictures of all my wireless network settings:



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MathijsKosters wrote:
60 incorrect packages 40 TCP-retransmissions 10 Not-recovered TCP-retransmissions

In one minute I got 0/600/300 of those. (Over wired gigabit) It seems to accumulate well over 200k per day.

I get about 32-35MB/sec during CIFS reads. I haven't tested large file writes recently. But that may give you an idea of how severe the errors are? My ReadyNAS doesn't have any connection dropout problems.

Good luck. I'm afraid I don't know enough about these to help out further.