Fastest Copying Via USB, FW Ports

Discussion in 'Apple Forum' started by CamFire, Jun 12, 2009.

  1. CamFire

    CamFire
    Well-known Member

    Joined:
    Apr 26, 2009
    Messages:
    4,693
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    Cambridge
    Ratings:
    +600
    What's the fastest copying setup for a Mac with two USB2.0 and one FW400 ports? The data is to be transferred involves two external drives, both with USB2.0 and FW400 ports. The amount of data transferred is in the order of 300 gigabytes.

    a. Both drives connected via separate USB ports
    b. Read drive on USB, write drive on FW
    c. Read drive on FW, write drive on USB
    d. Daisy chain BOTH drives on FW400

    Wish I can simply swap the HDDs inside the drives over but this is not an option.
     
  2. Tenex

    Tenex
    Well-known Member

    Joined:
    Mar 2, 2003
    Messages:
    7,632
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Ratings:
    +1,063
    I think firewire. I found in sustained copies that it was faster than USB also that there was a lower CPU load.

    I have been putting off a USB <-> USB copy of 700Gb because of the time it will take&#8230;
     
  3. alanrob

    alanrob
    Active Member

    Joined:
    May 24, 2001
    Messages:
    2,375
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    63
    Location:
    Glasgow
    Ratings:
    +234
    So you want to copy from one external drive to the other?
    If so, it won't matter which is used in Firewire and which in USB as the slowest connection speed (USB) will dictate the speed of the transfers.

    When I got my NAS drive I copied over 500GB of movies from my external drive to it via the USB connection on it. Left it running overnight. Took ages.
     
  4. CamFire

    CamFire
    Well-known Member

    Joined:
    Apr 26, 2009
    Messages:
    4,693
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    Cambridge
    Ratings:
    +600
    Thanks for the response, guys.

    I suspect a USB-to-USB transfer will be the slowest, but my unsupported suspicion is that the daisy-chained Firewire transfer is the fastest (in this case; of course FW-to-FW transfers will be the choice for two FW ports but there is only one now). I am only saying this because I read somewhere that a FW write-destination can be setup without having to involve the CPU directly in the transfer. In other words, the FW write device directly obtains the data from the FW read device.

    But, I may not be talking sense :rolleyes: .
     
  5. CamFire

    CamFire
    Well-known Member

    Joined:
    Apr 26, 2009
    Messages:
    4,693
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    Cambridge
    Ratings:
    +600
    Just discovered that the USB ports are not 2.0 :( , so there is only one choice - daisy chaining of the two FW drives.

    Took close to 45 minutes for a file just over 36GBytes - this comes to a transfer rate of more than 13.3Mbytes/sec.
     
  6. Tenex

    Tenex
    Well-known Member

    Joined:
    Mar 2, 2003
    Messages:
    7,632
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Ratings:
    +1,063
    I think that's correct, whereas USB always uses the CPU.

    The last time I did a large copy fw-fw400 I got a sustained rate around 28Mbyte/s with occasional peaks above that.

    You can see where my unenthusiasm for that 700Gb copy arises.
     

Share This Page

Loading...
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice