URGENT: Fastest "Bit for Bit" Backup?

Discussion in 'macOS' started by shorty116, Feb 18, 2010.

  1. shorty116 macrumors member

    Joined:
    Dec 8, 2004
    #1
    I have a broken external HD. I tried everything from Disk Utility to DiskWarrior to Techtool Pro to repair it - no success. Then i put it in the freezer (for 1 hour) and it actually worked for some seconds. Now i will leave it in the freezer for 24 hours to at least get some minutes with my data.

    As i probably won't have more than a few minutes, what is the fastest way to backup stuff? Normal copy/paste needs like forever because it first needs to determine how much files there are and secondly, as far as i know if it stops copying while not finished yet the whole copy process will be aborted… So i need something that copies "bit for bit" so that i can use every data copied until the HD dies again… any help appreciated!
     
  2. lannister80 macrumors 6502

    lannister80

    Joined:
    Apr 7, 2009
    Location:
    Chicagoland
    #2
    http://www.macosxhints.com/article.php?story=20050302225659382

    "Normally, in order to make a disk image, the disk you're copying from has to be able to spin up and talk -- in other words, it's OK to make a copy if the disk is healthy. But what happens when your disk is becoming a doorstop? As long as it continues to spin, even with physical damage on the drive, dd and Mac OS X will get you out of the fire."

    The answer is: dd.

    If you can't run dd because of security warnings, you may need to prepend the command string with "sudo" and authenticate yourself.
     
  3. sushi Moderator emeritus

    sushi

    Joined:
    Jul 19, 2002
    Location:
    キャンプスワ&#
    #3
    Depending on how valuable your data is, you might consider a data recovery service.

    Not cheap but will probably rescue more data than your method.
     
  4. lannister80 macrumors 6502

    lannister80

    Joined:
    Apr 7, 2009
    Location:
    Chicagoland

Share This Page