Big slow down with encryption on USB drive

Discussion in 'macOS' started by boast, Oct 21, 2015.

  1. boast macrumors 65816

    boast

    Joined:
    Nov 12, 2007
    Location:
    Phoenix
    #1
    With a plain software RAID0 setup with a USB enclosure, I was getting about 200MBps R/W. But with encryption enabled, write speeds seem to have dropped dramatically with a consistent 40MBps. Anybody have any idea what is going on?

    raid0.png raid0 encrypted.png
     
  2. MacUser2525 macrumors 68000

    MacUser2525

    Joined:
    Mar 17, 2007
    Location:
    Canada
    #2
    I would go with the encryption/decryption sucking up all kinds of bandwidth doing its thing. Really nothing else it can be, perhaps adding some ram may help a little to give it more room in memory if it is programmed that way but I doubt it.
     

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