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[velocci]

Hi all, I recently bought the Dlink DIR-655 router and I have a Dlink DNS 323 nas.  I have them connected and working.  When I send data from my PC to the DNS 323, i'm doing about 6MB/s.  when I'm sending data from DNS 323 to my PC, i'm doing about 30MB/s.   all 3 devices have the 1000 Mbps enabled and Jumbo frames is enabled on the DNS 323 and my PC.  When I tried disabling jumbo frames, the speeds were a bit lower.  is this normal?   what do i need to do to get the maximum speed from my DNS 323?

[Tipstaff]

A few things first:

- What operating system are you running? Have you changed your MTU settings in order to optimize your Internet speed (or have your run any programs that do so)? The reason I ask is that the same MTU settings you alter to optimize your Internet speed/performance is the same MTU setting that Jumbo Frames relies on, so if you've done anything to optimize them this can affect transfer speeds. For instance with XP setting and DSL setting your MTU to a much lower value such as 1462-1500 will limit your speed between the computer and the NAS.
- What do you have the Jumbo Frame size set to on the 323 and in your network cards settings? Max is 9000 (this is also the max automatically supported by the DIR-655 btw), but not all setups are able to run "stably" at 9000. Try lowering the limits by 1000 between each component (NIC and NAS), and between each copy/paste test. Also, try various settings. In my case the Realtek NIC in my main rig cannot go above 8000MTU, while my gaming rig running the Killer 2100 can do 9000MTU. However, if I set the Realtek NIC to 8000 I get 26MB/s read, but 8MB/s write on a 500MB file. At each 1000 increment I get different speeds, it even crashes when set to 6000 for some reason (the NAS just locks up hard). Try to find your "sweet spot". Mind seems to be 7000.
- Try using a program like TeraCopy instead of Windows copy/paste.
- I've noticed that read speeds tend to be faster coming off of the DNS-323 than being written to it, but an interesting note here is that write speeds are also be affected by the format of the drive, that being ext2 (faster, riskier) or ext3 (slower, but journaled).
- What anti-virus/malware protection are you running, if any? Do you get the same performance with them enabled or disabled?
- Do you have Link Layered Topology turned on in the NAS? If so, try disabling it.
- When determining speeds do so on a large file, and not a folder that might have smaller files. Smaller files, especially a lot of them, will throw off your "consistent" speed rating being reported by Windows.

[velocci]

Hi Tipstaff, thanks for the reply. 

-I'm running windows 7 64bit, but when I get my new PC (when Z68 motherboards come out) I may end up installing win7 32bit.  I'm not sure.
I looked for MTU settings on the nas but couldn't find it.  would it be called something else?

- when I tried the jumbo frames, I had it set to 9000 on the nas and 9014 on my computer.  My computer only has two settings for this, 4088 or 9014.  I notice that on the nas, it has alot more options.  I hope when I get my new PC, it will have the same options as on my nas.  do nic cards that are built into the motherboard usually have alot of jumbo frame options?

- I will try TeraCopy, thanks.

- when I was setting up my nas, I remember seeing something about ext2 (faster, riskier) or ext3 (slower, but journaled).  I tried looking for it this morning, but couldn't find it.  can you tell me where it is?

- I'm using Symantec internet security 2010 or 2011 right now.   I haven't tried transferring files with it disabled, but I will try.

- I don't know what Link Layered Topology is. I don't remember seeing that on the nas.  I'll look for it when I get home.  in case I can't find it, can you tell me where it is?


thanks alot for all your help.

[Eric-Tom]

I have the same issue and I hope someone can help us. I have Windows 7 with all Dlink routers, switches and everything... yet the file transfer rate is stuck at 8mb/s at max

[velocci]

Hi, i'm at work right now and I just downloaded tera copy and i'm using it to move a 13gb folder from my PC to another PC through the network.   Right now its going about 8MB/s.  our network is 100Mbps.  shouldn't it be going faster than that? I know the maximum is 12.5MB/s, but it still should be going faster than 8.  I will try this at home were the machines have gigabit lans.