Why the slow network copy (USB Ethernet 7-10Mbps)?

I have the fllowing setup:
MBA running 10.5 - USB Ethernet (100Mbps) - Netgear 1000/100 ethernet hub - 1000MBps Ethernet on Mac mini C2D running 10.5 Server. The ethernet speed between MBA and mini should be 100Mbps. There is nothing else going on on the local LAN.
I am copying a huge file (Parallels volume) with rsync via ssh from MBA to mini, On the mini it goes to a FW400 connected fast Rocstor drive.
The speed I am getting during the copy is 680kB/s, which probably translates to something like 7-10Mbps raw ethernet speed with all the package overhead.
What I am wondering is this: Why is this so slow?
Message was edited by: Gerben Wierda

I am using rsync because I am synchronizing a (say) 27GB directory with many files with another machine and I do not want to copy everything every time I want to synchronize.
I tried different forms of transport:
- using the Finder to copy to a shared drive. This goes at a speed of 759kB/s or around 7Mbps.
- a direct scp from the MBA to the /tmp drive of the OS X Server (so no firewire drive involved) and the speed was around 800kBps, so again around 7Mbps.
- Using ftpd on the server:
- A local copy on the server via the network with ftp from /tmp to /tmp ran at 21MB/s, so around 180Mbps.
- A remote copy from MBA to /tmp on the server ran at 680kB/s or around 6Mbps.
Basically, it seems that so far whatever method I use, I can't get it above 7Mbps on a 100Mbps interface when going from MBA via ethernet to the OS X Server.

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Printing to the network via USB Ethernet

I have a pair of MacBook Air's that are using the USB Ethernet adapter to connect to the local ethernet (wireless is not an option, all workstations must be wired while in-house.)
The problem I run into is that both of these MBA's will loose their connectivity to the printers, or their ability to see bonjour devices at all, or Appletalk devices. In particular, I've installed a set of OkiData printers on the network which support both Bonjour & Appletalk. When I setup the printers as IP printers, they seem to work fine. However, if they, or any other printer, is connected as a Bonjour device, eventually the MBA stops recognizing/seeing/looking up Bonjour items on the network.
Any thoughts on why this is or how to correct it would be really useful, especially since some day the users might like to do some bonjour-based file sharing.
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I have a client with the exact same problem. No bonjour when attached via USB ethernet (Apple's own) SOMETIMES. However, I've noticed that if she unplugs and tries the other usb slot, it seems to work (immediately, no reboot). I've actually only told her to do this over the phone, but it has worked at least twice.
One problem here is that the printers are NOT accessible via bonjour over WLAN, since the WLAN is at least 2 different C class networks.
The other is that due to the setup of the printers and crap drivers from Ricoh, using personalized printer queues only works over Bonjour and not TCP. Thus, only USB ethernet can be used for printing. It would be very interesting to hear if changing usb ports might help in your case as well. This particular client has a late 2010 MBA 4G/128G, but at the same department there are at least 7 MBAs where no-one has had the same problem. Either that, or they had it but never told me.

Apple TV (2nd Generation) -- Why the slow rentals? WHY?!?

Why does the current version of Apple TV not work? Why will it stream Netflix, YouTube, and AirPlay items with no problem and yet chokes on iTunes rentals? Why was it marketed to stream rentals? Why is it still Apple’s hobby and not a full-fledged device that, well let’s see… does what the <BAD WORD> it’s supposed to?
What follows below is a transcript of my experiences after receiving three rental credits because I made the mistake of renting “Elf” in HD for a group of kids and the Apple TV sputtered and stopped playing the video and then told me that said video would be ready to play in 3 hours which prompted me to lodge a complaint with customer support which had no explanation and provided me three credits for my problem <INTENTIONALLY LONG SENTENCE, BUT STILL MUCH SHORTER THAN THE TIME IT TAKES FOR APPLE TV TO LOAD A RENTAL>.
Rental credit 1 of 3. Used it to rent a movie.
 Connection: Apple TV via WIFI to Airport Extreme (latest model – 802.11n / 5GHz) to internet connection with 15Mbps download speed.
 Result: Pressed play, got loading circle, then message indicating movie would be ready to watch in 2h 40m. Then 3h 2m. Then 2h 35m. Then 2h 56m.
 Overall Experience: Horrendous. <VULGAR WORD> infuriating. Since I pressed play, the 24h window commenced and I wasn’t able to watch the movie the next evening.
 Final Outcome: Rental credit 1 of 3 used to watch nothing. Zero. Zip. 24h window expired with no viewing of film.
One week later…
Rental credit 2 of 3. Used it to rent the same movie above trying a different configuration.
 Pre-Rental: Performed hard reset of Apple TV and ensured latest version of software was loaded. Checked all connections.
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ATV2 works just fine with iTunes rentals, as long as your internet is reasonably fast. So help us help you -- what sort of speeds are you getting from your ISP? Not what it's rated at, what is your measured speed (use something like speedtest.net).
As far as why Netflix, YouTube, and Airplay can work fine, YouTube is not high resolution so you generally wouldn't have a problem unless your internet is very slow. AirPlay doesn't even use the internet, so that's a non-issue here.
Netflix's streaming technology is different from iTunes -- Netflix will slightly downgrade the video quality if the bandwidth is not good enough. But rentals from iTunes are queued up in your ATV2 with what it estimates is sufficient buffer to not run into problems with a slow network, but if the network is so slow that the buffer isn't big enough you'll have problems, particularly with HD rentals. Also, note that not much Netflix content is HD, so that can be another reason for the difference.

ADSL / router slowed Network copying ? help ?

I have 5 computers on a small network: 3 Macs (OS 9.2.2) and 2 Windows PCs and a networked printer connected using a 8 port switching Hub. The PCs are accessed using Dave's Network 6 on Mac (3) . Each computer and the printer has its own TCP/IP address.
I recently subscribed to Telus ADSL internet following the prompts on their CD. The Internet Mac (1) is isolated by a DLink DI-604 4 port router as the network firewall. I set up the DLink DI-604 according to its instructions.
It worked, I could access the internet and share files between the Macs, except copying files between the Internet Mac (1) and the other 2 Macs was very slow, any file over 300k would take 9 minutes, larger files above that might take 20 minutes or longer.
Copying between the other Macs (2 and 3) is ok.
I removed the Dlink Di-604, reset TCP/IP to local file sharing via TCP/IP and put the network back to where it was before this fiasco started.
Sharing files between the Macs is fine except copying files between the Internet Mac (1) and the other 2 Macs is still very slow, files larger than 500k result in long delays.
The files arrive on the receiving Macs in reasonably prompt fashion, but the sending Internet Mac (1) File Copying Window seems to freeze up in a 15 minute delay.
This project got very complex very quickly, if you have any ideas or suggestions please advise as trying to get any work done is very difficult.
Power Mac G4 350 Mac OS 9.2.x

Hopefully fixed problem myself
I made careful note of the TCP/IP settings and BRAVELY chucked out all the Telus internet stuff I could find.
Copying between Macs still didint work.
So I re-installed the OS 9.2.2 software from CD disk. SUCCESS copying is now working !!
It seems the Phone company's (Telus) supplied CD software wrecked my Mac's operating system. Telus claims they are aware of the problem (but they probably didnt want to confuse potential customers with scary stories)
You have been warned

My MacBook keeps switching the primary network connection to Ethernet cable

I've hooked up a Belkin N+ Wireless Router and it works just fine. Problem is everytime I shut down my computer or put it on sleep, the computer switches it's network connection to Ethernet and disconnects from my wireless network. I have to go into network settings and turn the airport on and refind my network in order to use the internet. Is there any way to make the computer set my wireless network as the primary network and not to change it? Thanks in advance for your help.

I think that you can - from the system preferences menu, select network, then click on the little gear at the bottom left side (just below your network devices), from there, select the option to "Select Service Order", then drag the wireless (Airport) to the top of the list.

Does or will the Airport Extreme be able to share the Guest network to a Ethernet port?

Did not know if there was or possibly will be the ability to seperate ethernet ports to make a hardwired guest network?

Sorry, not possible to extend the Guest Network using either wireless or Ethernet.
You might want to let Apple know on any new features that you want to see.
Apple - AirPort Extreme - Feedback

Why the computer network name change?

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Try giving your Mac a DHCP Client ID
System Preferences -> Network -> Advanced -> TCP/IP -> DHCP Client ID
This should tell your router that you are the same Mac and not assign you a new IP address when you move.
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Applicaitons -> Utilities -> Airport Utility
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Why the macbook networking is on and off?

I have a 15" macbook pro retina. Lately, the internet connection is on and off from times to times. I have done the upgrade of the latest OX version. Before the upgrade, it was OK. I wonder whether this is the problem?

Please test after taking each of the following steps that you haven't already tried. Stop when the problem is resolved. Back up all data before making any changes.
Step 1
Take the applicable steps in this support article. The Wireless Diagnostics program generates a large file of information about your system, which would be used by Apple Engineering in case of a support incident. Don't post the contents here.
Step 2
Disconnect all USB 3 devices. If you don't know which are USB 3, disconnect all USB devices except keyboard and mouse.
Step 3
If you're not using a wireless keyboard or trackpad, disable Bluetooth by selecting Turn Bluetooth Off from the menu with the Bluetooth icon. If you don't have that menu, open the Bluetooth preference pane in System Preferences and check the box marked Show Bluetooth in menu bar. Test. If you find that Wi-Fi works better with Bluetooth disabled, you should use the 5 GHz Wi-Fi band. Your router may not support it; in that case, you need a new router.
Step 4
Open the Network pane in System Preferences and make a note of your settings in the Wi-Fi service. It may be helpful to take screenshots of the various tabs in the preference pane. If the preference pane is locked, unlock it by clicking the padlock icon and entering your administrator password. Delete Wi-Fi from the service list on the left by selecting it and clicking the minus-sign button at the bottom. Then recreate the service by clicking the plus-sign button and following the prompts.
Step 5
Reset the System Management Controller.
Step 6
Reset the PRAM.
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Launch the Keychain Access application. Search for and delete all AirPort network password items that refer to the network. Make a note of the password first.
Step 8
Make a "Genius" appointment at an Apple Store, or go to another authorized service center.

The slow network or the slow update server.

Hey all! My whole family uses iTunes either with our PCs or Macs. My mum wants to update to iTunes 8.0.2, but when I go to the software update on her PC and click to install the update, it just stays there and doesn't install although it looks like it's trying to install. Is it a problem with the network or a problem with the update servers.

Its hard to tell from your post what the exact issue is however you can download the newest version of Itunes from [HERE|http://www.apple.com/downloads> and install it on your PC.
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Why the slow boot?

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My friends MBA does not do this.
Mine is also very slow to shutdown.
Looking in console, there are hundreds of lines like this:
15/05/2008 22:30:49 osascript[439] ATSClient: can't re-connect with ATSServer status = -3182
15/05/2008 22:30:49 osascript[439] ATSClient: can't re-connect with ATSServer status = -3182
15/05/2008 22:30:49 osascript[439] ATSClient: can't re-connect with ATSServer status = -3182
15/05/2008 22:30:49 osascript[439] ATSClient: can't re-connect with ATSServer status = -3182
15/05/2008 22:30:49 osascript[439] ATSClient: can't re-connect with ATSServer status = -3182
15/05/2008 22:30:49 osascript[439] ATSClient: can't re-connect with ATSServer status = -3182
15/05/2008 22:30:49 osascript[439] ATSClient: can't re-connect with ATSServer status = -3182
15/05/2008 22:30:49 osascript[439] ATSClient: can't re-connect with ATSServer status = -3182
15/05/2008 22:30:49 osascript[439] ATSClient: can't re-connect with ATSServer status = -3182
15/05/2008 22:30:49 osascript[439] ATSClient: can't re-connect with ATSServer status = -3182
15/05/2008 22:30:49 osascript[439] ATSClient: can't re-connect with ATSServer status = -3182
15/05/2008 22:30:49 osascript[439] ATSClient: can't re-connect with ATSServer status = -3182
15/05/2008 22:30:49 osascript[439] ATSClient: can't re-connect with ATSServer status = -3182
Any ideas?

I am experiencing exactly the same issue. VERY slow booting, very slow shut down times and my overall performance seems to be effected. This is with an iMac (20 inch - late 2007 model) with 4GBs of RAM. I have .Mac syncing and EyeTV. Does anybody have any solutions to this issue aside from disabling .mac and EyeTV?

Why the slow searching in iTunes 5?

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I was just wondering if other users with large libraries are experiencing the same problem. If so, is there any way to correct this issue that you've found? Thanks!

Hello:
Yes, I have this same problem. What's the deal? It's is quite annoying. I don't have a fix or haven't called Apple yet. Have you discovered anything?
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I get the following error message when I connect a usb ethernet adapter to my new MacBook Pro: Unsupported - You cannot use an Apple USB Modem with this computer. I live were we only have dial-up and the Apple Store said this is what I need.

I get the following error message when I connect a usb ethernet adapter to my new MacBook Pro: Unsupported - You cannot use an Apple USB Modem with this computer. I live where we only have dial-up and the Apple Store said this is what I need. In addition, when I connect the phone to the connecter it falls out, it will not click in.

Why are you using a usb ethernet adaptor? Just plug the modem into the usb port.

Sharing internet with 2 USB ethernet adapters?

Is it possible to connect the MBA via one USB Ethernet adapter to a LAN and share it with another USB adapter? Basically internet sharing from wired to wired.

...but the only way to know for sure...is to buy a 2nd USB Ethernet adapter which is a waste of money if it doesn't work
I didn't bring it up in the previous post, but since the discussion is going to continue...I would argue that getting a second USB wired ethernet adapter is a "waste of money." Why not get a router? OSX's Internet Sharing turns the Mac into a NAT device. This is the primary function of a typical home router. For about the same price as (or only a few dollars more than) the Apple USB ethernet adapter, you can get a router which will probably provide better throughput performance than Internet Sharing, especially if the machine you're sharing to is doing a heavy download, it likely slow down your machine even if you're not doing anything on the internet. (e.g.: Your Word Processing may will slow down if the other computer starts streaming Netflix.)
You can get small routers, if portability is needed and the 4-port wired switch is not essential. (i.e.: the Macbook has built-in wireless, as does most if not all portable computers.) I got one from D-Link that is the size of a deck of cards and runs off a USB port so no AC power is needed (although an AC adapter is included.) And of course Apple has the Airport Express.
To put it another way: you got a Macbook Air, which doesn't have any wired ethernet ports, but now you want two, and will use up all of your USB ports to do so. One could argue that you got the "wrong computer" for your needs. And even then, I would argue that a router is the "correct computer" to share one wired network connection.
Or can you make the defense and show significant negatives to using a router in your use case. And you have to go beyond price because a wired router is around $50 and often goes on sale for as low as $30, the same as the Apple USB ethernet adapter. And a wireless router is in the $70 range, with sale prices going down to $50. So I argue that a router is a better value.
(edit: for that matter, I forgot to ask, what kind of network connection are you trying to share? If it's like a university or other LAN where you can obtain more than one IP address, then you don't even need a router. A simple hub/switch will do, which I've seen on sale as low as $10, and free when people throw away their old junk. Hmmm, the price of the router could now be $0 if you have a friend that is upgrading their router to 802.11n. )

USB ethernet isn't showing up.

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I have narrowed the issue down more. On my 2011 one, when I click the plus button under network in system preferences, I have the option to add USB Ethernet (which is what I want). BUT, when I click create to add it, nothing happens. The prompt goes away like nothing happened. Why am I not able to add the USB Ethernet option?

Speed of Apple's USB Ethernet

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The Apple adapter is 10/100BT. The limitation is due to the USB port which supports speeds up to 480 Mbits/sec. This is not fast enough for Gigabit Ethernet which is 1000 Mbits/sec. I'm not sure what that third-party adapter does to attain a speed in excess of what the USB port can sustain. However, it requires a driver that only supports Windows. It's possible that the device will not work on a Mac.

Why the slow network copy (USB Ethernet 7-10Mbps)?

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