Hi all.I have a RNDU4000 with 2x3TB WDWhen I connect the NAS directly to my PC with CAT5 cable both the nas and pc is telling me the connection is 1GigaBit/swhen I copy files to the nas the speed is 47.7 MB/s that is the fastest speed I gett and that is very slow.1 Gigabit = 128 MB/sRight now I am copying file before I connect it to my Router DGDN4000 that I connect to my computer and devices with 5GHz band 450 MegaBit/s speed.and when I have the connected to the router and copy file throw wifi 5GHz band I get the speed about 10 to 15 MB/sand that is the same speed I got from my old wifi router that only have 108Mb/s wifi speed.So how can it be that I get the same speed on my new router as on my old router I both 2004?Is there a way to gett more speed

WiFi speed depends a lot on the distance, walls, etc and how much radio activity (interference). Link speed is very deceptive. In any event, you are certainly not limited by the NAS performance on your wifi connection. You can try changing channels, or even switch to 2.4 ghz band. inSSIDer is a good tool for looking at competing WiFi activity, though it will not show you interference from other stuff (microwaves, bluetooth, etc).Also, it seems unlikely that you were getting 15 MB/s with your 108 mb/s router, as Super-G (and its cousins) has a theoretical limit of about 60 mb/s throughput, and is usually less. That would be 7-8 MB/s tops. Perhaps there is caching going on in the PC?On the wired connection - are you using a desktop PC or a laptop? What NIC card? Also, you should be using CAT-5e or CAT-6, not CAT5.

when I did the test with wifi there were no other devices connected and the router was beside the computer just for testing.here are some test I did with wired no router.PC -> MBP speed about 70 to 90 MB/sPC -> NAS speed about 40 to 50 MB/sAnd wifi. tested with my MBP because the MBP have much better wifi card than my desktop pc and the desktop pc is using old 54Mb/s wifi card.MBP -> Router -> NAS speed about 8 to 10 MB/s (5G Hz Band)MBP -> Router -> NAS speed about 2.50 to 2.70 MB/s (2.4 GHz band)

I believe the WiFi 5 Ghz throughput, since 802.11n is similar in speed to 100 mbit ethernet. 50 MB/s or so is about correct for PC->NAS, you should get higher speeds on NAS->PC.

The speed is still to slow.My nas is connected with 2 cat-5e cables to the router with 1Gbps connection and if I connect a computer to the router with a cabal with 1Gbps connection I only get about 47MB/s and 47 MB/s is 376 Mbps and that is not 1 Gbps so that is very slow.And I get the same speed when I connect directly to the NAS with out any routers nor switch1 Gbps is 128 MB/s.And when I transfer BIG files throw wifi 5Ghz band and I have only 1 computer using that band withI get the speed about 10MB/s and that is to slow 10 MB(s and that is about 80 Mbpspls help me. and don't tell me I can't get any higher speed if so that I am foundering if the nas does not have any 1Gbps pan ports.

If you read this review: http://www.cnet.com/network-storage/net ... 013-2.htmlYou will see that they got 55 MB/s on writes. You are posting 47 MB/s which is pretty close. You should be getting faster speeds on NAS reads. Did you test that?On WiFi you are getting normal throughput - I am not sure what you are expecting there, but 80 mbits/sec is a good speed for 802.11n @ 5 gHz Normally your WiFi thoughput is 1/2 to 1/3 the link speed.

Ultra 4 Transfer speed very slow.

15 Replies

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Avorill
Aspirant
Dec 29, 2012
Sorry haven't changed my sig I don't have NV+ V2 any more I returned it back to the store and got the Ultra 4.

I will do more test on my PC and the MBP later on.

Is there any speed difference between AFP and CIFS?
when I do the test I use the same file and do the transfer 3 times.

I am not hoe right now so don't know the NIC my PC is using.

The firmware on the Ultra is the latest one.
tiranor
Aspirant
Dec 30, 2012
Avorill,

My ultra4 runs with 4 3TB disks (see my sig), using CIFS, i can't exceed 50MB/s, read or write, i usually runs at around 40-45MB/s.

But using FTP transfer (between my computer and my NAS), i usually get 105-110MB/s read and 60-65MB/s write.

The ultra4 hardware (and a part of software too, i guess) doesn't allow it to get higher speed. The jumbo frame setting brings really random results.
StephenB
Guru - Experienced User
Dec 30, 2012
Jumbo frames should be off anyway, as his router doesn't support them.
CMoney408
Aspirant
May 06, 2014
Did you guys ever find what was holding up the speeds?

I have gig ethernet on my PC, going to a 100mb swith, which goes to a r6300v2 AC router, then NAS is connected directly to the 6200 V2.

i know the switch is my weak point, i am getting about 11mb/s when transferring files to the NAS. is that about right? i feel like it should be much faster.

what would be the estimated speed bump if i replace the switch with a gigabit one?

Notes: both my computer and Nas show the MTU at 1500

forum question, how do i subscribe to a thread?
StephenB
Guru - Experienced User
May 06, 2014
CMoney408 wrote:
...i know the switch is my weak point, i am getting about 11mb/s when transferring files to the NAS. is that about right? i feel like it should be much faster.
11 MB/s (megabyte per second) is right => 88 mbits/sec. There are control packets as well as data packets on the wire, and some "dead" periods when one side or the other is waiting. So it doesn't quite add up to 100 mbits.

CMoney408 wrote:
what would be the estimated speed bump if i replace the switch with a gigabit one?
Large file reads at @ ~90 MB/s, large file writes@ ~60 MB/s. http://www.smallnetbuilder.com/nas/nas- ... l=&start=2

Definitely worth the investment, unmanaged gigabit switches are very inexpensive.

CMoney408 wrote:
Notes: both my computer and Nas show the MTU at 1500
First of all, that's the correct value for your network. Second, those are settings, not status.

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Ultra 4 Transfer speed very slow.

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