Very Slow Performance on RN104

hi,
similar problem here, but worst.
RN102, FW 6.1.6, Win 7 x64

connect via homeplug (powerline)
read 700KB/s
write 1.3MB/s

direct ethernet cat 5e connect to same router (linksys wrt)
read 23.433503 MB/s
write 22.408892 MB/s

original with 6.0.0 FW, upgraded to 6.1.6 and reset settings.
tried different cat 5e cables with no improvement.
router linksys wrt54g
test connect via lan and wifi, all file transfer slow like turtle.

any idea what's wrong?
how to troubleshoot?

already followed the instruction in http://kb.netgear.com/app/answers/detail/a_id/12242
and used iometer to test.

nas102 wrote:

hi, similar problem here, but worst. RN102, FW 6.1.6, Win 7 x64 connect via homeplug (powerline) read 700KB/s write 1.3MB/s direct ethernet cat 5e connect to same router (linksys wrt) read 23.433503 MB/s write 22.408892 MB/s original with 6.0.0 FW, upgraded to 6.1.6 and reset settings. tried different cat 5e cables with no improvement. router linksys wrt54g test connect via lan and wifi, all file transfer slow like turtle. any idea what's wrong? how to troubleshoot? already followed the instruction in http://kb.netgear.com/app/answers/detail/a_id/12242 and used iometer to test.

Well, you can't get more than about 11 MB/s with the wrt54g, as it only supports 100 mbit ethernet. Over 802.11g wireless you won't get more than about 2.5 MB/s.

Your iometer ~22MB/s results were not "direct connect" if you were connected through the router. "direct connect" means ethernet cable between the PC and the NAS with nothing in between. Also, your results suggest that you had too much buffering in the test configuration. Fast ethernet cannot carry 22 MB/s.

So the first thing to do is get a new router (gigabit ethernet + 802.11n or 802.11ac).

the result of iometer test is 100% follow the instruction from netgear and also use config file provided.
how likely the test instruction provided is to deceive performance of the device in question?

nas102 wrote:
the result of iometer test is 100% follow the instruction from netgear and also use config file provided. how likely the test instruction provided is to deceive performance of the device in question?

Since you are measuring about 200 mbits of throughput on a 100 mbit connection, the likelihood of the measurement being wrong is 100%.

Unless you have a different network setup than the one you outline in your post. For instance, if you have a gigabit switch or router, or if you were connecting the PC directly to the NAS (and not using the router in the iometer test).

I suggest retesting with nastester (you can download it here: http://www.808.dk/?code-csharp-nas-performance).

And getting a new router.

BTW, what powerline product are you using?

Aztech homeplug AV mini 200mbps - HL113E

if the homeplug utility show connection rate 50+ Mbps then copy file from RN102 to computer is about 2.8MB/sec (windows explorer)
the connection rate quite stable but sometime fluctuate to other speed.

If you have another PC to test with, maybe try a PC-PC throughput test. Though I am thinking your numbers are about right (like wifi, the powerline link speed is much higher than the throughput).

Hi
I was very annoyed with the slow speed of my ReadyNAS. After reading a lot about JumboFrames, SMB vs. AFP an so on, I almost gave up. Until I finally stumbled over the AntiVirus setting in the ReadyNAS System. Switched that of and whooom, I finally got that speed I looked for!!!

thanks for the recommendation and advice.
I finally have the problem solved recently.
Among couple of things I did was to use separate power socket extender for powerline home plug and computer - guess that solved noise for powerline.
Second I updated NAS firmware to OS 6.1.8.
Third I use other wall socket since I noticed some wall socket are slightly 'noiser' than other because powerline home plug link indicator turn to orange/red frequently.

Below is the speed i achieve copying file from PC to NAS with connection: PC Ethernet LAN port -> Powerline home plug ->Powerline home plug -> 100Mbps router -> NAS
That's about 60Mbps!



I'm quite happy with this speed now as I read this article, i'm about there correct.

http://msdn.microsoft.com/en-us/library ... 10%29.aspx


You can calculate the theoretical maximum in the following way for the 100baseT Ethernet:

100BASE-T is clocked at 100 MHz, with a 25-MHz crystal multiplied by 4. The coding is 8/10, meaning one byte is packaged into 10 bits. Therefore, you can at most transfer 100/10=10 million bytes per second. To convert this number to megabytes per second (MBps), divide it in the following way:

10,000,000/(1024*1024)=9.5 MBps

Then there is the question of efficiency. Ethernet provides up to 90-95% efficiency (CSMA-CD). There is a maximum payload of about 1500 bytes per frame, and some minimum inter-frame spacing. Also, if you use half-duplex cabling, the ACK packets must take the bus sooner or later, making it almost impossible to reach the maximum.

The frame format for 802.2 over Ethernet is at maximum 1487 bytes, or 1484 depending on the Ethernet standard used IEEE, or DIX.

Thx for posting back. I agree you are there, the most you could possibly get is ~10 MB/s due to the 100 mbits ethernet hop, and you are getting 7.5 MB/s

You can get power filters for powerline, which might give you more options on which outlet pairs to use (reducing the noise). Some adapter models have them built in.