Windows 7 on iMac

Discussion in 'iMac' started by Trojans, Dec 3, 2012.

  1. Trojans, Dec 3, 2012
    Last edited: Dec 3, 2012

    macrumors member

    Joined:
    Sep 11, 2012
    #1
    Just installed a clean copy of windows 7, and the system is freaking slow because of 5400 rpm HDD. If fusion drive doesn't work in windows, I'm gonna change my 1 TB fusion drive to SDD. I can't take this freaking slow speed of HDD anymore. From push power button to desktop, it takes 75 seconds, and then open Spotify, it takes me 30 seconds. Totally, it takes me almost 2 minutes. My MBP has a SDD. All of above I mentioned, it just takes less than 30 seconds. Damn it, Why don't Apple make every iMac SDD standard?
     
  2. macrumors regular

    Joined:
    Jun 18, 2012
    #2
    Can you let me know how gaming works? I heard the HDD shouldn't make a difference in-game? Personally I won't have another use for windows in bootcamp.

    If you're using windows 7 for other purposes than gaming, look into installing it on an external ssd, I think I read somewhere that it's possible, but honestly I'm not sure.
     
  3. throAU, Dec 3, 2012
    Last edited: Dec 3, 2012

    macrumors 68030

    Joined:
    Feb 13, 2012
    Location:
    Perth, Western Australia
    #3
    75 seconds is not normal, even for a 5400 rpm drive. It should be nearer 20-25 sec for a clean Windows 7 install.

    Windows 7 has problems with picking correct partition alignment on the brand new 4k sector drives.

    If you can, I would find a copy of Windows 7 SP1 (or Windows 8) and install from that, as the installer in SP1 is intelligent enough to correctly align your disk partition to 4k sectors. Note: installing win7 SP1 on top of your current setup WILL NOT fix this. You need to do a clean install from a newer OS that knows about 4k drives, or align the partitions manually. You'll need to re-partition the disk.


    Or locate a guide (google) on Windows 7 partition alignment.


    The problem isn't 100% due to your hard drive, you are seeing WAY worse performance than you should due to the win7 installer not knowing about 4k sectors. If the partition is misaligned - every single read or write operation you do will be multiplied - a write requires 2 sector reads and a write, a read requires 2 reads.

    I just spent a couple of days sorting this problem out at work...
     
  4. macrumors 68000

    Aluminum213

    Joined:
    Mar 16, 2012
    #4
    Why wouldn't fusion drive work with windows? Are you using bootcamp or parallels?
     
  5. macrumors regular

    Joined:
    Jul 11, 2011
    Location:
    Melbourne Australia
    #5
    May I ask how you installed windows on your imac ? :)
     
  6. thread starter macrumors member

    Joined:
    Sep 11, 2012
    #6
    I downloaded a copy of Win 7 and followed Boot camp instruction.

    ----------

    I'm using bootcamp because some softwares are not working in parallel
     
  7. throAU, Dec 3, 2012
    Last edited: Dec 3, 2012

    macrumors 68030

    Joined:
    Feb 13, 2012
    Location:
    Perth, Western Australia
    #7
    see here:
    http://www.overclock.net/t/1156654/seans-windows-7-install-optimization-guide-for-ssds-hdds


    not sure how boot camp will affect this.

    You may be able to realign your existing boot camp partition by running a third party partitioning tool, such as a gparted liveCD.

    I haven't run one on a mac and am not sure if it will work, but it may be worth a try. Back up your machine first obviously.

    Realigning will take several hours, as every sector within the partition needs to be read and re-written to disk.


    Also, see here for more info: http://www.anandtech.com/show/2888


    4k alignment isn't only an SSD problem. Newer hard drives use 4k sectors these days as well.
     
  8. macrumors member

    Joined:
    Nov 26, 2012
    #8
    +1
    Have you played any games yet??
     

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