AirPort Extreme (n) - Only 5 MB/sec throughput?

Discussion in 'Mac Accessories' started by MBHockey, Jul 21, 2007.

  1. MBHockey macrumors 68040

    MBHockey

    Joined:
    Oct 4, 2003
    Location:
    New York
    #1
    This is my setup: 1 MacBook and 1 airport extreme (n) router with a HD connected to it via USB 2.0.

    I have been trasferring a large folder with only two files in it. It is around 17 GB total. However, according to iStat in the MenuBar, i am only sending data out at around ~5 Mb/sec. Is this the maximum speed for my situation?

    I have installed the N enabler that came with the AirPort extreme and have made sure that the router is running in N-only mode (at 5GHz).

    Also, in Network Utility when i choose my AirPort interface, the link speed is being reported as 130 mb. Why isn't this closer to 300? Is it because of the WPA2 protection?

    Edit: Removed WPA protection, and link speed is now correctly being reported as 300 mb. However, still around 4-5 Mb/sec transfer speeds to the drive. Am I missing something?
     
  2. CanadaRAM macrumors G5

    CanadaRAM

    Joined:
    Oct 11, 2004
    Location:
    On the Left Coast - Victoria BC Canada
    #2
    No, that's correct. USB requires the CPU to manage reads and writes and the Airport's tiny little brain just can't handle the load.
     
  3. MBHockey thread starter macrumors 68040

    MBHockey

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    Oct 4, 2003
    Location:
    New York
  4. Lollypop macrumors 6502a

    Lollypop

    Joined:
    Sep 13, 2004
    Location:
    Johannesburg, South Africa
    #4

    Very very tiny brain then.... and 5megs/second is rather good.. I cant get more than 2... :mad:
     
  5. jonsey macrumors newbie

    Joined:
    May 22, 2009
    #5
    Me too! only 6MB/sec Airport Extreme

    I have 2 Airport Extremes setup in bridge mode using 5GHz 802.11n and on either Airport Extreme I have a PC connected via one of the 1Gbit ehternet ports. (Pretty easy and fast to setup - and it works like a charm!)

    However when copying files between the two PC's I only get 5-6MB/s - shouldn't this be 10-20MB/s (or more since the standard theoritically is 300Mbit/s which is eqv. of 37,5MB/s)

    Does the Airport extreme not use channel bondling? or why is the transfer speed so low?

    I've also tried setting it up without encryption which hardly made any difference (expected an increase in throughput)

    I'm even configured it to use widechannels - but still no difference - is it firmware? I've upgraded to the newest 7.4.1 stil no result!

    Anyone!??!
     
  6. jonsey macrumors newbie

    Joined:
    May 22, 2009
    #7
    Still only 6MB/s transfer speed

    Hi consultant I had read the article you refered me to, and others alike however it is apparently very difficult to find any info from Apple about what this unit is surpose to deliver - and how to make it deliver it.

    No matter what I do configuration wise it makes the transfer speed slower. 6MB/s is just not good enough - I think I will try some other product to bridge with - maybe the DLink DAP-1522 or alike.
     
  7. brentsg macrumors 68030

    Joined:
    Oct 15, 2008
    #8
    5GHz is greatly affected by obstacles in the typical home, much moreso than 2.4 in my experience. I think shooting for 10MB/s is going to require a short distance and clean line of sight. It's almost comical to criticize Apple for lack of support and then cite D-Link as your next step. My experience with D-Link is that you're lucky to even get a firmware update when it's necessary.

    Don't fault Apple for not holding your hand with wireless. There are far too many factors in the wild that degrade theoretical performance.
     
  8. jonsey macrumors newbie

    Joined:
    May 22, 2009
    #9
    Initially I setup the units 5 feet from each other and the through put was 6MB/s - now they are about 15 feet apart with a couple of brick walls in between and the through put is still 6MB/s. (I was actually surprised that it didn't effect the through put that much.)

    If I get the chance to test some other brands/models in the near future - I will post the result here.
     
  9. flopticalcube macrumors G4

    flopticalcube

    Joined:
    Sep 7, 2006
    Location:
    In the velcro closure of America's Hat
    #10
    As has been mentioned, its a limitation of the AEBS chipset. Other routers may give better results.
     
  10. Consultant macrumors G5

    Consultant

    Joined:
    Jun 27, 2007
    #11
    Can't even find benchmark for that d-link model.

    Other N models have similar wifi speed as Airport Extreme Base Station.
     
  11. flopticalcube macrumors G4

    flopticalcube

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    #12
    They all probably share the same chipset, so its no wonder.
     
  12. rkdiddy macrumors 65816

    rkdiddy

    Joined:
    Mar 19, 2008
    Location:
    OC Baby!
    #13
    Question -

    Since the OP has one of his computers hard wired to the AEBS and then his HD attached to that - would he get better transfer speeds if he hooked his HD up to the computer connected to the AEBS, rather than the AEBS itself?:confused:
     
  13. Consultant macrumors G5

    Consultant

    Joined:
    Jun 27, 2007
    #14
    Yes, USB connection is cheaper than firewire because it requires the use of additional processor.
    A computer processor is faster than an appliance processor, which means faster usb drive access speed.
     
  14. jonsey macrumors newbie

    Joined:
    May 22, 2009
    #15
    I see no reason for not stating theoretical max especially if they know it to be lower than 300mbit - other than misleading the customers - all they have to do is explain that performance is degrade by obstacles such as metal surfaces and brick walls aso. I'm not saying apple are the only ones doing it.

    So I'm not dissing Apple as such - I actually think the firmware/software in the Aiport Extreme is the most intuitive I've seen to date. But if the max through put in mint conditions is lower than industry standard I would have liked to have known this before paying $200 for it - for example the D-Link DAP1522 is only around $100.
     
  15. Sesshi macrumors G3

    Sesshi

    Joined:
    Jun 3, 2006
    Location:
    One Nation Under Gordon
    #16
    Disk-on-AEBS is pretty much the same as many other low-cost NAS's. The throughput is pretty pathetic. I'd suggest a dedicated NAS with a better processor, which would be faster. Of course, the wireless throughput of the AEBS is a factor, but it should be faster in any case.

    Look here:
    http://www.smallnetbuilder.com/component/option,com_nas/Itemid,190/chart,12/

    For relative reference, the AEBS's 'brain' + throughout for USB disk duties is generally slightly worse than the QNAP TS-101 in the chart. And as you can seen the WRT600N - a very similar router to the AEBS, only that it actually has a firewall - is at the bottom of the list.
     
  16. brentsg macrumors 68030

    Joined:
    Oct 15, 2008
    #17
    I've never seen any objective tests or reviews that found it to be slower than other draft 2 N products.

    And as far as being lower than 300mbit, have you ever seen anyone actually achieve any of the wired theoretical maximums? Nope...
     
  17. eXan macrumors 601

    eXan

    Joined:
    Jan 10, 2005
    Location:
    Russia
    #18
    My AirPort Extreme N with 100 Mbit Ethernet and a USB 2.5" HD attached to it are able to show 5-6 MB/sec speeds on large files when accessed via wi-fi, and 9-12 MB/sec when accessed via Ethernet.
     
  18. rgarjr macrumors 603

    rgarjr

    Joined:
    Apr 2, 2009
    Location:
    Southern Cal
    #19
    Mine goes around 7.5MB/s on wireless N when dumping a file from my USB hard drive.
     

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