High Finder CPU when external harddrive full

Discussion in 'Mac Basics and Help' started by spetykowski, Jan 2, 2010.

  1. spetykowski macrumors member

    Joined:
    Sep 1, 2007
    #1
    Is it normal for external hard disk write speed to slow to ~5MB/s when a hard drive is almost full? I have multiple external hard drives almost at capaticy and when I write to it Finder CPU usage hits 90%. Does this sound normal? When the harddrive is empty i am getting 80MB/s.
     
  2. BlueRevolution macrumors 603

    BlueRevolution

    Joined:
    Jul 26, 2004
    Location:
    Montreal, QC
    #2
    The external hard drives are probably fragmented, which slows down write speeds as the drive approaches capacity. Easy solution: leave a bit of breathing space.
     

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