Local file transfer speed slow on E1200

On a local file transfer (computer to NAS or NAS to computer) my file transfer speed with the E1200 is way too slow. I would expect the Wireless N speed to be at least 54mbps (megabits per second), which would be equivalent to 9 MegaBytes per second.
In practice the speed of transfer appears to be at 8mbps (1 MegaByte per second). Here is a screen shot:
The speed is the same whether I copy from the computer (on a wireless N link) to the NAS, or from the NAS (on a 100Mbit ethernet port on the E1200) to the computer. The NAS is brand new, auto configured to a RAID-1 setup with two new drives.
Anyone know why this is? is the encryption (WPA2-PSK/AES) slowing down the transfer? The same problem occurred with copying a folder of photos as with copying this large file. I don't think I can upgrade the firmware on my device, as I have the first version of the E1200.
Solved!
Go to Solution.

Sabretooth --
There is no option to set the Qos to zero. I can set it to "auto" in which case the number has no effect.
I could set it to manual but it restricts me to a range as you can see from the graphic.
In case you are wondering, my internet speed is 10Mbps downstream, 5Mbps upstream. So I am getting the same speed for the internet that I am getting for a local transfer.
The next troubleshooting step is to bypass the wireless and hook my PC to the router. I will let you know if that makes a difference.

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3) Run the following command in an elevated command prompt to confirm the command above is successful:
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3. Check the value of “Speed & Duplex” is Auto in Advanced Properties of the NIC. If not, please let us know your value.
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1) Open “Network security:Minimum session security for NTLM SSP (including RPC based) Clients”,
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3) Open
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Last edited by stefanwilkens (2010-09-13 11:11:37)

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You are using wireless I presume. Wireless is a shared media and transfer speed on wireless whilst absolutely fine for internet is going to slow things right down to move large files. The basic recommendation is to do the first backup over ethernet and then use wireless for the incremental backup.. anytime you need to move large files or directories then cable it.
8GB in 2 hours is slow.. but the estimation is made at the point the wireless maybe busy. And those estimations are not accurate at all.
Try and get the your Macbook close to the TC and check the link speed. You can see it by holding the options key and clicking the airport icon... at least you can in SL .. Lion not sure.
You want it using 5ghz as the TC is slow in 2.4ghz and range is poor at 5ghz.
IMHO it is better to force the wireless yourself to 5ghz by using different network names. But Apple designed it to automagically swap to the fastest link.. the trouble is, links tend not to be dropped during a file transfer.
stalling at 5 seconds remaining is unusual isn't it?
Not for wireless it isn't.

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Thanks in advance for taking the time to consider this.
Our still photgraphic studio has a range of MACs all connected via a gigabit D-Link switch to a series of Buffalo NAS raids. Wiring is CAT5e, all devices have gigabit ethernet cards and the link lights on the switch suggest that all devices are connected at that speed.
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I'm getting sustained speeds of 90-100 megabytes/second on a transfer across GigE from one mac to another, both working on high-capacity SATA drives.
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My experience with NAS boxes has been disappointing in the past, with transfer rates of 5-35 MB/sec - painfully slow for large files, which destroys the purpose of NAS for me, which is reasonably high-speed off-computer storage.
I'm MUCH happier, and didn't have to pay very much to set up a Mac with 4 SATA drives onboard, acting as a file server... I'm actually getting files FASTER than I am from a FW800 drive directly attached now.

Local file transfer speed slow on E1200

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