Laggy Mac - Slower Than Normal Hard Drive Read Speeds?

Discussion in 'MacBook Pro' started by kolax, May 30, 2011.

  1. kolax macrumors G3

    Joined:
    Mar 20, 2007
    #1
    Generally my Mac has been slow since I got it. To cut a long story short: I had a 7200RPM hard drive in a MBP, which I sold for a 2010 MacBook Air. I got really used to the MacBook Air's speed, given it has an SSD (that was my first time using an SSD). I then exchanged the Air for the new MBP.

    Anyway, I put down the sluggishness of my MBP to the fact that I was so used to an SSD before hand. However, I've been monitoring the hard drive read speeds, and when doing hard drive intensive stuff (i.e. booting up a virtual machine or loading Photoshop) the read speeds are on average 5MB/s, peaking 12.5MB/s briefly. Booting up Parallels Desktop literally brings my Mac to a crawl - I've used Parallels for years, and on my old MBP, same setup, while it slowed things down during boot, it never came to a standstill (Safari beachballing, not able to do anything until Parallels has finished booting the VM).

    This is a stock 5400RPM hard drive. Is this normal read speed? Perhaps Activity Monitor isn't the best way to measure disk performance..
     
  2. Detrius macrumors 68000

    Joined:
    Sep 10, 2008
    Location:
    Asheville, NC
    #2
    Activity Monitor is most certainly not the best way to measure read performance. Check the logs for something along the lines of 'disk0s2: I/O error'. /var/log/kernel.log in 10.6, or /var/log/system.log in 10.5 and earlier.
     

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