Network transfer speeds

Hi Guys,
I've got a wired ethernet network set up here at home.
I'm using an Airport extreme which is connected directly to my modem.
From there, I have the Airport connected to a brand new Gigabit switch.
All my devices: 2 imacs, 2 apple tv's, a d-link Gigabit NAS.
For some reason, I can't get transfer speeds over 41.3 MB/sec
I've tried this on all devices. Reset everything.
Is this speed typical of Gigabit? I thought it would be much much faster.
Not sure how to diagnose the issue. Screen shot of network activity below....
Any suggestions?
Cheers,
Nick

We had a similar issue and the issue was the LRO settings in esxi
http://billyc5022.blogspot.com/2011/09/vmware-esxi-41-optimizations-for-cisco.html
Sent from Cisco Technical Support iPad App

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[solved] Intel 5300 slow network transfer speed

Heya,
I'm having trouble with my WiFi card Intel 5300 AGN and i hope you can help me.
It's the transfer speed in linux that bugs me. While I get 9 MB/s in Windows I can't for the life of me get more than 2.5 MB/s transfer rate in linux. And this is only if I use NFS4 and turn off the wifi power saving feature. Samba/CIFS gives me transfer speeds of no more than 0.4 MB/s.
The problem has to be somewhere in my linux software/configuration. But where?
I don't have much experience with WiFi configuration in Linux so mine should be pretty vanilla. No manual change of frequencies, channels and the likes. I simply use netcfg to connect and sometimes iwconfig to toggle the power saving feature.
Here's what iwconfig shows me right now while copying a big file:
wlan0 IEEE 802.11abgn ESSID:"bett"
Mode:Managed Frequency:2.412 GHz Access Point: 00:14:D1:C7:43:C4
Bit Rate=243 Mb/s Tx-Power=15 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=61/70 Signal level=-49 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:11922 Invalid misc:2 Missed beacon:0
As you can see, power management is disabled. The link quality is very good and the bit rate is at 243 Mbps (which should give me about 15 MBps right?). Yet the transfer rate is only 2 MBps, sometimes dropping as low as 0.7 MBps, sometimes spiking to 4.5 MBps for a second or two.
What can I do to improve my network speed?
Any help is greatly appreciated.
Regards,
demian
Last edited by demian (2011-04-09 04:00:49)

Thanks for the reply zvxy.
I'm running the most current from [core], version 2.6.37.5-1.
Disabling the N mode improved transfer rates for CIFS/SMB shares. They are the same as with NFS now which is around 2.5 MB/s. Transfer speed for NFS stayed the same.
I'll try the kernel from [testing] and report back later.
// I've tested 2.6.38.2-1 a little bit now and as long as i don't disable wireless N i get transfer rates of up to 12 MB/s with NFS4. That's more than enough for me and i hope it stays that way. The downside is that transfer rate for CIFS is only 1 MB/s.
If i disable wireless n mode NFS transfer rates drop to ~2.8 MB/s while CIFS transfer rates go up to ~2.4 MB/s.
Guess I'll just have to stick with NFS (not that i don't mind but it's already thrown me some "stale" error messages with the new kernel ... i can't seem to catch a break ).
I'll consider this issue solved. Thanks!
Last edited by demian (2011-04-09 04:00:30)

Slower Network Transfer Speeds with .7

Since upgrading to .7, I've noticed slow transfer speeds. For example, when transferring one large file, I get 11MB/sec on average. When transferring a bunch of smaller files, I get about 1 - 1.5MB/sec. I remember is being faster in .6
This is transferring files from my Mac Pro to my Time Capsule, using Gigabit Ethernet.
Can someone let me know what speeds you are getting when transffering a large file from a Mac Pro to a TC and also a bunch of small files from a Mac Pro to a Time Capsule. (or any NAS drive)
I used Activity Monitor to test the speeds. Thanks.

Does your PC have a FireWire port? you can use IP over FireWire for better throughput than the wired ethernet.
You can't use link aggregation in this case since it requires multiple interfaces of the same type (e.g. two gigabit ethernet cards), but you cannot mix media such as AirPort and Ethernet.
The alternative would be to install a gigabit ethernet card in your PC. You'd at least then get gigabit ethernet speed between the two devices which is also a step up.

After security update INTEL Macs network transfer speed slows

MBP C2D and iMac CD transfer speed between them is close to "b" speed after the update. I tried transfer to my G4 that has a G card and it was same speed for both INTEL Macs. Grabbed another G4 laptop with G card and the transfer speeds between those two were at "g" speeds. All 4 machines connected using Apple Express wireless router.
Changed AE router to 5.5 and higher multicast. No affect. Changed channels to 11 and others and back to Automatic, no change in speed.
Cleaned out cache on all INTEL Macs, same "b" speed. Despite all these adjustments the PB G4 wit the "g" cards continued to transfer at "g" speeds, whil the INTEL Macs are stuck at "b" speeds.
I suppose I can do Archive and Install on the MBP and not apply the latest security patch to see if that may be it. But I'm hoping someone has done this already and post their results. If not I'll try it in a bit.

I can think of 3 things that have worked fpr different people...
http://discussions.apple.com/thread.jspa?messageID=4471006&#4471006
Airport Extreme Update 2007-03 has fixed it.
Rollback the Airport kext...
http://discussions.apple.com/thread.jspa?messageID=4310165&#4310165
See patrick187_'s instructions for Move "AppleAirport2.kext" file to the desktop...
http://discussions.apple.com/thread.jspa?threadID=934370&tstart=0

10.9.2/3.1.1 server terrible transfer speed!

Hi,
Just installed a brand new mini with 16GB mem and SSD disk. The transferspeeds, afp or smb are absolutly terrible. Anyone?

I'm going to guess that there's some sort of a network involved here, and that you've tested local transfers and those run at (much) faster speeds.
Slower network transfer speeds are usually some combination of WiFi interference, or problems with the wiring or the switch (some patch cables can really hinder performance), or a misconfigured speed or duplex setting with a wired network connection, or a slow network link somewhere. Older 100 megabit ethernet (MbE) switches are slow choices for storage access, and gigabit ethernet (GbE) networking is preferred here.
Start testing some different configurations, and see if you can isolate the trigger.

Very slow network directory listing - but fast data transfer speed once listed?

Hello,
I have really tried to sort this myself before opening up to the community, however I have run out of ideas, and hope someone can offer the magic solution I have missed.
I am currently using the 3.4ghz i7 iMac on a 1GB LAN, running OSX10.7.2 - connecting to a Windows Server 2008 (Running Release 2) over ethernet.
If i go to a network directory that i haven't recently accessed it can take up to 60 seconds to show the contents of that directory. Once i have accessed that folder, if i come out of it and go back in it will be instant again - but the first time it lists the directory it looks like i have opened an empty folder - which after anything from 10seconds to 1 minute will suddenly show the files that are there.
Internet connectivity is fast through the network, and file transfers across the LAN are fast. (showing as approx 300mb per second) I can play and edit HD content across the network with no slowdown so I am confident that this issue is not related to the network speed itself, and is more to do with a setting on this mac.
Symptoms are very similar to this post: https://discussions.apple.com/message/12245148?messageID=12245148&amp%3b#1224514 8 - however i understand that in OSX Lion - SMB was removed - so i cannot find this file to edit.
I have tried bypassing additional hubs in the network by wiring direct cables to the switch that is connected to the file server, this made no difference.
I have also tried disconnecting the ethernet cable, and running over wifi. This fixes the listing problem, but when editing HD content over a network drive, this connection is not fast enough to carry the data without interruption (some projects are linked to up to 900gb of hd video content!)
Using ethernet, I have tried DHCP, DHCP with manual address, and manual mode. All reproduce this problem. i have tried using the windows workgroup, and tried without it.
I have also followed this suggestion: https://discussions.apple.com/thread/2134936?threadID=2134936&tstart=45 and used OpenDNS. this did not fix the issue.
For argument sake, I have also just tested a Macbook Pro running Snow Leopard to see if it was OS related. This reproduces the exact same problem, near instant directory listing on the wifi, a long and arduous wait on ethernet.
I cannot work out why directory listing is instant over wifi, but not over ethernet on 2 different macs, running 2 different versions of OSX. I also do not understand why if the network is having trouble listing the directories - the data transfer speed is 300mbps when i copy files across the wired network from the file server to the mac.
Does anyone have any other ideas as to what could be the problem here? We are about to start work on a very large project, where the content we are editing is spread out across around 200 different network folders (different shoots captured over the past 2 years). We really don't have the time to wait 60 seconds each time we need to access one of those directories to look for a file, and I am very close to pulling all my hair out!
I really look forward to hearing from anyone who can offer any insight.

If you are suspecting that the Windows update had something to do with your LAN going slow, then try the following:
1. Look for updates for your clients LAN NIC driver; or
2. Un-install the updates.

File Transfer speeds in Fios Home network...

What should the normal speed (mb per second) on transferring files between two hard wire computers on a home network...
I'm averaging around 1mb per second and that doesn't seem right...
I have a normal Fios triple play setup/ all desktops connecting w/cat5 and laptops are wireless..and whatever router verizon sends with the package.
Any info on what transfer speeds would be great...
Thanks

I know there have been speed issues with Windows Vista and TCP receive window scaling. Remote differential compresion in Windows Vista should also not be installed or enable. If you have Vista be sure you have SP1 and have optimized the connections. There have also been many issues with XP to Vista. I would look at the Operating systems, and doubt very stronly that the switch in the router supplied with FIOS would have anything to do with it. Look for information on files transfers with Vista, if you are running it. I am, and love Vista but had similar issues before tweeking it.

Very slow transfer speed between 2 computers in the same network

I recently bought a new laptop (Lenove G510) with win 8.1 pre-installed.
When i download files of the internet, my speed is ok, for wireless, but when tranfering files between computers (The other computer is a win 7), the transfer speed is really slow (2-4 MB/s). The transfers takes forever, and are relly unstable. It bounces from 1 - 4 Mb/s all the time and will not stabilize.
The same applys when streaming to other devices (Media Center). The video being streamd will just go frame by frame, and it is no fun watching...
Why is my transfer speed in local networsk so slow?? How can i fix this?
I use AVG Anitvirus, and I have tried disabeling it before transer, whitout results...
I have also updated BIOS, Chipset and the driver for the wireless network card...
I can also mention that when I turn my computer on, the internet connection is lost to all other devices... I then need to reset the router, and then the connection is fine again. This was never a problem before I got Windows 8.1, and is not a problem while the computer is turned of.
In advanced, thansk for any replys/tips
Regars, Morten

Just to be sure it's set up properly, please work through the steps on this page:
http://homepage.mac.com/rfwilmut/notes/sharing.html

Slowww transfer speeds from my networked G5 to powerbook

I am trying to tweak my network and get my mac g5 and powerbook g4 talking quickly. Both on 10.4.3, I'm getting speeds slightly greater than internet transfer speeds going to and from. I'm not a wizard but I feel like I have a pretty decent handle on it. Can someone give me a few tips?
Using a standard issue linksys wireless router/cable modem and my g4 laptop (built in wireless), and my g5 (airport extreme card).
First off, I'm trying to make sense of the networking options. In my network finder window, I have the folder with my domain name (club403), then library, then My Network, then Servers. If I try to connect via Club403, I get the SMB/CIFS connect window (looks dif than the other one) which allows me to connect to my user account on the remote machine. Connecting here provides me the lowest speeds. If I use My Network and connect there, it allows me to locally mount a drive from the remote computer. This gives me faster speeds but nowhere near what I can achieve on the same wireless network using my PCs. Any tips would be much appreciated!
thanks,
steve

#1 The license agreement only allows you to run the OS on one computer at a time.
#2 needsomeihelp appears to be giving you instructions for installing using the discs but you don't have those.
#3 You can clone a drive to another drive in a bootable manner but in doing so you will erase the target drive.
#4 I am not sure how well Tiger installed for a G5 will run on a very different model. Sometimes specific resources are installed according to the model computer the installer detects.

Slow fileshare transfer speeds with Lion Server

I'm running Lion Server on a Mac Mini and using SMB to share files between the server and both Windows and Mac machines. I can't figure out why I can only get 2 Mb/s transfer speeds between the server and the other machines. I'm quite certain I'm not limited by my network and the disk write speeds clearly exceed 2 Mb/s. Any suggestions for boosting this speed or is this an actual limit of SMB or Lion Server?

Have a similar issue on a Macbook Pro mi 2010 : since the 10.7.3 update, Samba file sharing (to access a FreeBsd server over the LAN) is extremely slow. I mean I can't work normally since the update (3 weeks).
I've reported the bug to Apple. I think it is a bug limited to some machine version (because other mac in the office do not have the issue)

What transfer speed can I expect via wired ethernet?

3 iMac's wired to an AirPort Extreme....what transfer speeds should I expect? I'm only getting 40-60MBps IMac to IMac via Ethernet provides up to 70MBps. I am wanting to get a Thunderbolt Drive but worry that while the iMac that the Thunderbolt HD is plugged into will get much faster transfer rates, when access the Thunderbolt HD from another iMac on the network I will still be stuck with the 40-60MBps rate. Surely there is a way to get faster network speeds than 40-60MBps?

Tesserax, You are are correct, I was just hoping that there was some way to get better performance out of my network speed so that the $1500 Thunderbolt purchase was worth it. What I now plan to do is get the $999 model R4 4-1TB just so I can have one since the iMac that the Thunderbolt HD will be plugged in to will be doing the most editing so in some ways it does help me....just not as much as I was hoping it would. I can at least take my old FireWire HD and plug it into my iMac and use that for FCPX projects that are for more personal than business use.
Having only 1 HD that 3 iMac's can use to edit images from has really helped me out with keeping everything in order.
If you can daisy chain the Thunderbolt Drives I have to wonder why they didn't have it so 2 iMac's couldn't connect to 1 HD. With 2 Thunderbolt ports on the iMac you would think you could connect iMacs together using 1 port on each then have the other port for like HD's, extra screens, etc You know what I mean? If you are going to make this super fast port/cable you might as well make it to connect iMacs as well.

Checking Transfer Speed

I am using a Macpro to synch files with an AppleTV and to share files with my Macbook Pro and audio with an Airport Express. Where can I check the transfer speed when I send files from my Macbook Pro to my Macpro or the other way around or the transfer speed to the AppleTV or the Airport Express?
Thanks.

I would sugget you try out menu meters from 'Raging Menace'
menu meters
It will show you your network throughput in the menu bar once you enable it in the menu meters preferences.

WRT350N - Transfer speed via Storage link

I have always been curious what the transfer speed others get while using
a USB 2.0 hard drives on their WRT350N.
Obviously there is going to be a drop in transfer speed using storage link but 2-3 Megabyte seems slower then I would expect. I don't thnk I have ever seen much about 3MB.
I see the same performance wirelessly (connected at 270mb) and hardwired into the gig ethernet port.
Just wanted to get some other peoples results.
Message Edited by GAH1068 on 01-17-2008 02:04 PM

It was on both systems. However, I did get it working. Not the way I liked, but it works. What I expected to see was the device hung off the network. That is like another computer. This *is* happening, but where I was confused was the access to it. On other shared resources I can open it at will with no special access rights needed. I'm talking about printers and files on other computers on the network. It turned out to access the Storage Link I had to actually provide a USER ID and PASSWORD before I could use it. Why I couldn't get access before was I had HTTP:\\192.168.1.1 already open in my browser so any other attempts via the web browser used the existing connection. Not until I saw a forum message that said use START=>RUN and enter the IP address or UNC name was I able to connect to it. Since I now know this, a simple bat file with some NET USE's should fix the problem of getting access. Compounding my problem is how I've chosen to manage the network and shares. I use Network Magic, and it can NOT see the Storage Link at all. Anyway, I now know how to access the Storage Link. I was using a Flash drive for testing. I'll next put a USB External drive on and try that out. My ultimate try will be a USB hub and 4 external drives and hopefully I'll have access to all 4 drives to all computers. Irv S.
Thanks,
Irv S.

Transfer speed of USB vs Gigaport attached drive WRT610N

I know this is a loaded question but here goes: Assumptions: eqivalent drive specs but one is connected to the USB port of a 610N and the other is connected to the gigaport of the 610N which drive should have the fastest throughput and approximately by what % margin?
The reason that I am asking this question is that I did a backup of about 40GB to a Seagate drive attached to the USB port and it TOOK FOR EVER!!!!!!!!!!!!!!
I have a gig capable drive on order and am praying that the performance will be much better than the USB drive.

What is the speed you are getting from the USB Port..?
I think you need to make some changes on your Wireless router, so the Download and upload speed improves.
Open an Internet Explorer browser page on your wired computer(desktop).In the address bar type - 192.168.1.1 Leave username blank & in password use admin in lower case...
For Wireless Settings, please do the following : -
Click on the Wireless tab -
This settings are for 2.4GHz.
-Here select manual configuration...Wireless Network mode should be mixed...
-Provide a unique name in the Wireless Network Name (SSID) box in order to differentiate your network from your neighbours network...
- Set the Radio Band to Standard-20MHz and change the Standard channel to 11-2.462GHz...Wireless SSID broadcast should be Enabled and then click on Save Settings...
Please make a note of Wireless Network Name (SSID) as this is the Network Identifier...
For Wireless Security : -
Click on the Sub tab under Wireless > Wireless Security...
Change the Wireless security mode to WEP, Encryption should be 64 bits.Leave the passphrase blank, don't type in anything...
Under WEP Key 1 type in any 10 numbers please(numbers only and no letters eg: your 10 digit phone number) and click on save settings...
Please make a note of WEP Key 1 as this is the Security Key for the Wireless Network...
Click on Advanced Wireless Settings
Change the Beacon Interval to 75 >>Change the Fragmentation Threshold to 2304, Change the RTS Threshold to 2304 >>Click on "Save Settings"...
Now see if you can locate your Wireless Network and attempt to connect, and after this try Downloading and Uploading on your Storage Drive and check whats the speed you are getting
Same goes for your 5GHz Wireless Network.
Wireless Network mode should be mixed...
-Provide a unique name in the Wireless Network Name (SSID) box in order to differentiate your network from your neighbours network.
Set the Radio Band to Wide-40MHz and change the Wide channel to159 and Standard Channel to 161-5.805GHz...
For Wireless Security : -
Click on the Sub tab under Wireless > Wireless Security...
Change the Wireless security mode to WPA, For Encryption, select AES...For Passphrase input your desired WPA Key. For example , MySecretKey , This will serve as your network key whenever you connect to your wireless network. Do NOT give this key to anyone and remember the key.
NOTE : Passphrase should be more that 8 characters...
Try and see how is the data transfer speed.

Internal Disk to Disk Data Transfer Speed Very Slow

I have a G5 Xserve running Tiger with all updates applied that has recently started experiencing very slow Drive to Drive Data transfer speeds.
When transferring data from one drive to another ( Internal to Internal, Internal to USB, Internal, Internal to FW, USB to USB or any other combination of the three ) we only are getting about 2GB / hr transfer speeds.
I initially thought the internal drive was going bad. I tested the drive and found some minor header issues etc... that were able to be repaired so I replace the internal boot drive
I tested and immediately got the same issue.
I also tried booting from a FW drive and I got the same issue.
If I connect to the server over the ethernet network, I get what I would expect to be typical data transfer rates of about 20GB+ / hr. Much higher than the internal rates and I am copying data from the same internal drives so I really don't think the drive is the issue.
I called AppleCare and discussed the issue with them. They said it sounded like a controller issue so I purchased a replacement MLB from them. After replacing the drive data transfer speeds jumped back to normal for about a day maybe two.
Now we are back to experiencing slow data transfer speeds internally ( 2GB / hr ) and normal transfer speeds ( 20GB+ / hr ) over the network.
Any ideas on what might be causing the problem would be appreciated

As suggested, do check for other I/O load on the spindles. And check for general system load.
I don't know of a good GUI in-built I/O monitor here (and particularly for Tiger Server), though there is iopending and DTrace and Apple-provided [performance scripts|http://support.apple.com/kb/HT1992] with Leopard and Leopard Server. top would show you busy processes.
Also look for memory errors and memory constraints and check for anything interesting in the contents of the system logs.
The next spot after the controllers (and it's usually my first "hardware" stop for these sorts of cases, and usually before swapping the motherboard) are the disks that are involved, and whatever widgets are in the PCI slots. Loose cables, bad cables, and spindle-swaps. Yes, disks can sometimes slow down like this, and that's not usually a Good Thing. I know you think this isn't the disks, but that's one of the remaining common hardware factors. And don't presume any SMART disk monitoring has predictive value; SMART can miss a number of these cases.
(Sometimes you have to use the classic "field service" technique of swapping parts and of shutting down software pieces until the problem goes away. Then work from there.)
And the other question is around how much time and effort should be spent on this Xserve G5 box; whether you're now in the market for a replacement G5 box or a newer Intel Xserve box as a more cost-effective solution.
(How current and how reliable is your disk archive?)

Network transfer speeds

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