blazeddraco

Q: windows partiton doesn't show complete storage ! need help

guys I installed windows 10 today I selected 50 gb for windows but after completely installing windows I got 46.6 gb where does 3.2 gb went ? when I see bootcamp from osx it shows 50 gb but when I boot into windows it shows 46.6 what does this mean ?

MacBook Pro with Retina display, OS X Yosemite (10.10.1)

Posted on Jun 2, 2016 2:37 PM

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Q: windows partiton doesn't show complete storage ! need help

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  • by joe_7399,

    joe_7399 joe_7399 Jun 3, 2016 5:06 PM in response to blazeddraco
    Community Specialists
    Jun 3, 2016 5:06 PM in response to blazeddraco

    Happy Friday, blazeddraco!

     

    From your post, my understanding is that you're noticing a bit of a loss in storage space on your Windows partition after creating a Boot Camp partition. Is that correct? If not, please let me know.

     

    If my understanding is correct, this may be due to a bit of a calculation difference based on how OS X reports storage capacity. This resource has the information I'm referring to: How OS X and iOS report storage capacity

     

    Specifically, check out this area of the article:

    Capacity stated on product packaging

    Storage device manufacturers measure capacity using the decimal system (base 10), so 1 gigabyte (GB) is calculated as exactly 1,000,000,000 bytes. The capacity of the storage media in your Mac, iPad, iPod, iPhone and other Apple hardware is measured using this decimal system. This is detailed on product packaging and online through the statement "1 GB = 1 billion bytes."

    Understanding storage capacity in Solid State Drives and Flash Storage

    Storage capacity displayed in Disk Utility for Solid State Drives and Flash Storage will show a slightly smaller size. For example, a 256 GB Solid State Drive (SSD) should have a total of approximately 250 GB.  

    These items may account for the additional space used in your Solid State drive and Flash Storage: 

    • EFI Partition
    • Restore Partition 
    • Wear-leveling blocks
    • Write-buffer area
    • Metadata
    • Spare blocks
    • Grown bad blocks
    • Factory bad blocks

     

    I hope this clarifies things for you. Enjoy your weekend!

  • by BobTheFisherman,

    BobTheFisherman BobTheFisherman Jun 3, 2016 5:31 PM in response to blazeddraco
    Level 6 (15,324 points)
    Jun 3, 2016 5:31 PM in response to blazeddraco

    Aside from your question about difference in size reporting, IMHO, 50 GB is not large enough for Windows unless you are not planning on installing any programs or working with any data. Before going any further I suggest you uninstall Windows using Boot Camp Assistant then start again reinstalling Windows this time allocating a minimum of 100GB for the Boot Camp partition.