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Extremely slow Airdisk Speed

1916 Views 11 Replies Latest reply: Sep 9, 2007 3:49 PM by MrSteveee RSS
mcfarlanea Level 1 Level 1 (0 points)
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Jul 31, 2007 2:33 PM
I've got a Lacie 250GB HD hooked up via a USB 2.0 hub to my Airport Extreme. My mac is connected via 802.11g. My average read/write speeds are around .5MB/second, nowhere near what I get when I'm tethered directly. I understand there's some amount of overhead, but isn't g capable of more like at least 4-5MB/second? What's holding me up? This makes it impossible to stream video.
iBook G4, 1.33Ghz, Mac OS X (10.4.10), Upgraded HD, 80GB
  • Alfred (like the butler) Calculating status...
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    Aug 17, 2007 9:32 PM (in response to mcfarlanea)
    I am having the same problem. Same hard drive (LaCie 500 MB). Similar computer (G4 PowerBook).

    I have been attempting to use it for iTunes, but the speed issue causes gaps in my audio.

    I would like to know how to improve the read time as well.
    PowerBook G4, Mac OS X (10.4.9), Series B iMac OS9 30GB iPod Photo 1.2.1 AirPort Extreme 802.11n AirPort Express
  • grizzly marmot Level 2 Level 2 (225 points)
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    Aug 18, 2007 5:54 AM (in response to mcfarlanea)
    You can expect speeds of 2MB/s Read and Write from the Airdisk using 11n, the 100NT and 11n connections are in the 4-7MB/sec range and a 1000BT connection is even 50% faster. You should try connecting the mac to the basestation via an ethernet cable and take the hub out also. Then you should be able to determine if it is a disk, hub, base station or reception issue
    eyeMac G5 2.1, Pismo G3 400, MBP, Mac OS X (10.4.10), If it's a black marmot - fight back, if it's a grizzy - play dead
  • Mario Dees Calculating status...
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    Aug 18, 2007 7:54 AM (in response to grizzly marmot)
    Are these numbers theoretical or based on what the specification should allow for?

    I have been running some tests yesterday and was hoping to see actual results others have had.

    My test was with 250GB MyBook, which directy connected to my MacBook Pro writes data at around 22 MB/sec. Using 11n I was able to clock in around 2.2 for the AirDisk, using Ethernet 100 around 1.6 and finally using Gigabit I still do not get more than 2.5 max.

    In theory, I guess I was hoping, Gigabit is capable of higher transfer speeds than high speed USB2, so I figured it would clock in at least somewhere around having it connected directly vis USB. But I guess I was wrong. Since I have it connected directly via CAT6 short patch cord to the Airport Extremege Gigabit, so no hub or any other devices in the middle.

    Is this all I can expect?
    PowerBook 17" 1.5 GHz 2GB, Mac OS X (10.4.3)
  • grizzly marmot Level 2 Level 2 (225 points)
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    Aug 18, 2007 10:12 AM (in response to Mario Dees)
    The airdisk speeds are pretty low compared to what you would get if you were connecting to a server. If you have a multi computer network, when you have one of the Macs set up with File Sharing turned on the transfer speeds through the base station will make you happy. My minimal research has discovered that getting fast speeds from a network storage device is very expensive - like $650 for a gigabit ethernet 500MB hard drive. Most of the inexpensive ones have the same performance as the airport extreme 11n basestation.

    Message was edited by: grizzly marmot
    eyeMac G5 2.1, Pismo G3 400, MBP, Mac OS X (10.4.10), If it's a black marmot - fight back, if it's a grizzy - play dead
  • Alfred (like the butler) Level 1 Level 1 (5 points)
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    Aug 18, 2007 7:41 PM (in response to mcfarlanea)
    I think I will give up on using AirDisk this way. I think I need a larger local hard drive, or directly connected (USB or FireWire) external hard drive, or Apple TV.
    PowerBook G4, Mac OS X (10.4.9), Series B iMac OS9 30GB iPod Photo 1.2.1 AirPort Extreme 802.11n AirPort Express
  • Barry Brown3 Level 1 Level 1 (5 points)
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    Aug 18, 2007 7:45 PM (in response to mcfarlanea)
    Today I did some extensive tests on this very issue and discovered that some USB drives are indeed very slow and others are relatively fast.

    I posted my findings elsewhere on this discussion board: http://discussions.apple.com/message.jspa?messageID=5159159#5159159
  • grizzly marmot Level 2 Level 2 (225 points)
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    Aug 19, 2007 7:39 AM (in response to mcfarlanea)
    With Barry's tests it seems to appear that it is a hub issue. The multi-interface enclosures have a hub in front of the disk interface.
    eyeMac G5 2.1, Pismo G3 400, MBP, Mac OS X (10.4.10), If it's a black marmot - fight back, if it's a grizzy - play dead
  • Barry Brown3 Level 1 Level 1 (5 points)
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    Aug 19, 2007 8:34 AM (in response to grizzly marmot)
    Ah! I'll try putting a hub in front of the USB-only disk and see what happens. If we get a degradation in throughput, then we've nailed it.
  • Bobs Uncle Level 1 Level 1 (0 points)
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    Aug 20, 2007 3:21 AM (in response to mcfarlanea)
    Same setup as Barry. Exact same problem: write speeds of < 500Kbps.

    Latest firmware on the AEBS (100MB). Formatted no Journaling.
    Mac Mini, Mac OS X (10.4.7)
  • MrSteveee Level 1 Level 1 (70 points)
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    Sep 9, 2007 3:49 PM (in response to mcfarlanea)
    MacBook 2gHz Core Duo, Mac OS X (10.4.2), 1 GB RAM, Superdrive, 100 Gig HD

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