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    Inspiron 1545 - USB2 doesn't seem to be working

    Discussion in 'Dell' started by cam94z28, Oct 21, 2011.

  1. cam94z28

    cam94z28 Notebook Enthusiast

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    I have an Inspiron 1545 with the Intel ICH9 chipset. I have several external hard drive enclosures, and none of them seem to transfer over 30MB/sec. USB2.0 should be a theoretical 480Mbps, or 60MB/sec.

    Just to clarify. I have a Thermaltake BlacX dock, a Nexstar 3 3.5", and a Toshiba 2TB eSata/USB2.0 external drive. Attached is a screenshot to show that the USB2.0 controller drivers are installed. Also a screenshot of HDtune on my BlacX with Maxtor (Seagate) STM3500630AS.

    Has anyone else experienced this? Also. I'm just the same basic USB cable for all enclosures. Would there be a specific cable I would need for USB 2.0?
     

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    cam94z28, Oct 21, 2011
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  2. Tsunade_Hime

    Tsunade_Hime such bacon. wow

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    Uhh the 480 Mbps is for very small file transfers, and the max theoretical speeds. If you transfer large files you will see higher speeds, lots of small files not so much.
     
    Tsunade_Hime, Oct 22, 2011
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  3. cam94z28

    cam94z28 Notebook Enthusiast

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    Actually it seems to be the opposite in my experience. If I copy a large file, or a series of large files, The transfer starts out bursting to 50-65MB/sec (according to windows copy). Over about a minute it levels off around 30MB/sec, and stays there for the rest of the transfer.

    Testing with HDTune, HDTach, CrystalDiskMark, etc..., which, I would assume use the equivalent of large files, all show 30MB/sec. Obviously I'm connected to USB2.0, as I'd only be seeing 12Mbps with USB1.1. I was just hoping to get closer to the theoretical maximum. 3 different enclosures (all drives capable of more than 30MB/sec), and 2 different PC's (laptop, and desktop) resulted in identical transfer speeds.
     
    cam94z28, Oct 22, 2011
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  4. namaiki

    namaiki "basically rocks" Super Moderator

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    25-30MB/s is quite normal for USB 2.0 as far as I know.
     
    namaiki, Oct 23, 2011
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