High Finder CPU when external harddrive full

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

  1. spetykowski macrumors member

    Sep 1, 2007
    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


    Jul 26, 2004
    Montreal, QC
    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.

Share This Page