Does this sound right, SuperDuper took 4.25 hours to backup my drive (to ext drive)

Discussion in 'Mac Basics and Help' started by techmonkey, Dec 1, 2007.

  1. techmonkey macrumors 6502a

    Joined:
    Jun 8, 2007
    #1
    I just downloaded SuperDuper today to backup my 120GB MBP hard drive to my new Maxtor One Touch 4 USB 2.0 external drive. I did some test last night transferring single files to the external drive, and I get about transfer rate of 18.18 MB/sec.

    Here is how I am backing up with SuperDuper.

    1. I followed the "How to backup to an Image" FAQ on the forum. I created a encrypted, sparse image the size of my MBP hard drive, 120GB.

    2. I then chose the full backup feature on SuperDuper.

    Finally finished the backup.

    Here is the log

    603,332 files evaluated. 593,396 files copied. Effective copy speed 5.07MB/s.

    Elapsed Time: 4:12:27

    The resulting image is now 72.8 GB

    At 15,147 seconds, thats about 4.8MB/s on average.

    Shouldn't it be at least 2-3 times faster ?
     
  2. Vader macrumors 65816

    Vader

    Joined:
    Oct 11, 2004
    Location:
    Saint Charles, MO
    #2
    I would guess that is because of the encryption, but that is just a guess.

    I know that when you make a compressed image with CarbonCopy it takes forever because it is compressing it. SO I would assume the encrypting has the same effect for you.
     

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