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USB 2 port behaving as 1.1
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Junior Member
Join Date: May 2003
Location: Gye, Ecuador (Home) | Mty, Mexico (Colllege)
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Hi all,
I have a Macbook 2.0 Ghz Core 2 Duo supposedly with two USB 2.0 ports, but i'm starting to feel they are running at 1.1 speeds.
To my knowledge USB 2 devices should work at around 480Mbits/s (60MB/s) and 1.1 at 12Mbits/s (1.5MB/s).
I have an iPod Shuffle with 1GB and it takes around 6 minutes to transfers 850 MB and about 4 minutes if i try to transfer a ~700MB file.
So my question is how much time does it take for you to trasfer ~800 MB to a usb 2 device?
Or how much time it takes to fill your iPod Shuffle?
And if it is behaving as 1.1 anyone knows how to fix it?
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Posting Junkie
Join Date: Oct 2005
Location: Houston, TX
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Keep in mind those values are theoretical maximums; in reality you can get up to about half that. You're getting 19Mbps (850MB in 6 min) to 23Mbps (700MB in 4 min), which is well above the capability of USB1.1. I'd guess Apple's just using slow/cheap flash memory in the shuffle. 20Mbps is about 17X on the flash memory speed rating scale (same as CDROM drives), which was good a couple years ago but kinda pokey today.
FWIW, it takes me about 30 seconds to transfer 800MB over USB2 to an external hard drive.
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Junior Member
Join Date: May 2003
Location: Gye, Ecuador (Home) | Mty, Mexico (Colllege)
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That is what i mean it should take secons not minutes, with other usb drives i have the same low speeds, so i don't think it is the shuffle
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Moderator  Join Date: Jan 2001
Location: Polwaristan
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Your time sound close to what it takes me to transfer that kind of data to a USB 2.0 flash drive connected to my MBP C2D.
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Posting Junkie
Join Date: Oct 2005
Location: Houston, TX
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Originally Posted by eme 
That is what i mean it should take secons not minutes, with other usb drives i have the same low speeds, so i don't think it is the shuffle
Or you buy cheap USB drives. 
OS X's USB drivers aren't known for being the speedy, but they shouldn't be that bad. Try a USB hard drive, preferably 3.5" instead of 2.5".
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Dedicated MacNNer
Join Date: Jan 2007
Location: Oakland, CA
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Alternatively, if you have an old USB 1.1 hub you could try routing the shuffle through there and see if the speed has noticeably declined from being plugged directly into the computer.
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17" MBP C2D 2.33/3 GB RAM/500 GB 7200 rpm/Glossy Display|-|
17" iMac CD|-|15" PB G4 1.25 GHz|-|iBook g4 1Ghz|-|Pismo
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Forum Regular
Join Date: May 2007
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kinda off-topic somewhat but I do not want to start another thread for this question:
I have a PB G4 with 1.1 ports, if I purchased a 2.0 USB hub would that work or create a bottleneck as the hub itself?
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Moderator Join Date: Jan 2001
Location: Polwaristan
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It wouldn't give you USB 2 speeds between your computer and your devices, if that's what you're asking.
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Forum Regular
Join Date: May 2007
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