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  1. #1
    USB too slow on Mac Pro?
    FatherTime's Avatar
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    USB too slow on Mac Pro?
    I have a MacPro Nehalem 2.66 Quad with a Caldigit USB 3.0 card. In testing the time to make a CCC I see the Firewire 800 is still faster than the USB 3.0.,
    Has anyone else seen this?

  2. #2
    USB too slow on Mac Pro?
    chscag's Avatar
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    You're about the third or fourth forum member who has stated the same thing about using USB 3.0 cards in their Mac Pro or as an Express slot card in the MBP.

    You're lucky you even got it to work. Some folks have had a nightmare with drivers and the cards still did not perform at USB 3.0 speeds.

  3. #3
    USB too slow on Mac Pro?
    harryb2448's Avatar
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    Why are using using either with four hard dive bays unless each are full?

    Nothing is as fast as the SATA II 4GB/s transfer rate.
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  4. #4
    USB too slow on Mac Pro?
    FatherTime's Avatar
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    Quote Originally Posted by harryb2448 View Post
    Why are using using either with four hard dive bays unless each are full?

    Nothing is as fast as the SATA II 4GB/s transfer rate.
    Umm! Two 2TB's sitting on top that also go on trips.:-)

  5. #5
    USB too slow on Mac Pro?
    dtravis7's Avatar
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    I am sure there is more going on here with the USB 3.0 cards, but USB in general is never as fast in real use as it is on paper. That is why I have never liked USB anything except for mice and keyboards.

    How slow you talking? Did you do any measurements?

    I do agree with FT, even with 4 bays inside, external drives are easily moved and can be used with other systems.

    I have never tried this, but since you have a Mac Pro, is there not a Spare SATA port on the logic board? If so, I would get an E-SATA bracket and use the drives E-SATA which BLOWS down any USB anyway! I swear I saw people adding an E-SATA port to a Mac Pro.

  6. #6
    USB too slow on Mac Pro?
    FatherTime's Avatar
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    Quote Originally Posted by dtravis7 View Post
    I am sure there is more going on here with the USB 3.0 cards, but USB in general is never as fast in real use as it is on paper. That is why I have never liked USB anything except for mice and keyboards.

    How slow you talking? Did you do any measurements?

    I do agree with FT, even with 4 bays inside, external drives are easily moved and can be used with other systems.

    I have never tried this, but since you have a Mac Pro, is there not a Spare SATA port on the logic board? If so, I would get an E-SATA bracket and use the drives E-SATA which BLOWS down any USB anyway!
    As I remember the USB 3.0 moved 1.93 GB's per min and the F/W 800 did right at 2.0 per min on an 80GB CCC. But I may check again,

  7. #7
    USB too slow on Mac Pro?
    Dysfunction's Avatar
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    USB shares the processor bus and some processor cycles. As far as I'm aware this is still the case with USB 3.0. So it would not surprise me that fw (which does not share resources) would be faster in practice.
    mike
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  8. #8
    USB too slow on Mac Pro?
    chas_m's Avatar
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    IME USB (any version) is actually about 60 percent as fast as it claims to be. At BEST.

    But yes, USB 3 should in fact be a bit faster than FW 800 (and nowhere near as fast as Thunderbolt or eSATA but that's a different topic).

  9. #9
    USB too slow on Mac Pro?
    dtravis7's Avatar
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    Quote Originally Posted by chas_m View Post
    IME USB (any version) is actually about 60 percent as fast as it claims to be. At BEST.

    But yes, USB 3 should in fact be a bit faster than FW 800 (and nowhere near as fast as Thunderbolt or eSATA but that's a different topic).
    Agreed.

  10. #10
    USB too slow on Mac Pro?
    FatherTime's Avatar
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    Quote Originally Posted by chas_m View Post
    IME USB (any version) is actually about 60 percent as fast as it claims to be. At BEST.

    But yes, USB 3 should in fact be a bit faster than FW 800 (and nowhere near as fast as Thunderbolt or eSATA but that's a different topic).
    I have an eSATA card in this machine also. I'll do another test between the three and see who's the faster.

  11. #11
    USB too slow on Mac Pro?
    dtravis7's Avatar
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    Proper E-SATA is just as fast as Internal SATA. Nothing will touch it except maybe Thunderbolt. If your E-SATA is not faster than the others, something is wrong.

  12. #12
    USB too slow on Mac Pro?
    Germany_chris's Avatar
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    Quote Originally Posted by harryb2448 View Post
    Why are using using either with four hard dive bays unless each are full?

    Nothing is as fast as the SATA II 4GB/s transfer rate.
    The limit of 4 drives, 5 with only one optical is one of the reasons I sold my MacPro. The point of a tower is to keep everything in the box and I'm currently at 8 HDD's. I'm hoping the new MP will have more drive bays so I can sell the Hack and get a proper MP again.
    Mac Pro 4,1 (Flashed to 5,1) W3570 3.2 Quad..48GB RAM..Gainward GTX 570 "Phantom."
    MacBook Pro 5,2..2.8Ghz C2D..8GB RAM..240GB Vertex +

  13. #13
    USB too slow on Mac Pro?

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    Quote Originally Posted by FatherTime View Post
    I have a MacPro Nehalem 2.66 Quad with a Caldigit USB 3.0 card. In testing the time to make a CCC I see the Firewire 800 is still faster than the USB 3.0.,
    Has anyone else seen this?
    There might be problem with drivers. And you can even try using Firmware on Pro and check out if it works. I think there should be support problem also.

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