mikenmar
Level 1 (4 points)
Windows Software

Q: Error copying Windows 10 files to USB

I'm trying to do a fresh install of Windows 10 on a late 2015 iMac running El Capitan 10.11.3, but I'm getting errors.

 

I've downloaded the ISO file from Windows; it's the 64 bit English version.  The file name is Win10_1511_English_x64.iso and I've checked the SHA1, so I know it's good.

 

I'm trying to make a USB drive in Boot Camp, but I'm getting errors when I try to set up the USB.  I'm using a 16GB USB 2.0 flash drive, brand is PNY.  I've used Disk Utility to format it to MS-DOS (FAT), with the Scheme set to Master Boot Record.

 

After I get to the stop where Boot Camp warns "The drive will be erased", I get this error:  "Your bootable USB drive could not be created" and "An error occurred while formatting the disk"

 

If I click Continue and try it again, it seems to format OK, but then when it starts copying over the Windows files, I get this error: "Boot Camp installation failed" and "An error occurred while copying the Windows installation files."

 

I've Googled these errors and found a lot of responses, but none of the fixes seem to work for me.  It's not a matter of the ISO image being mounted -- I've made sure it's unmounted when starting up Boot Camp, but that doesn't help.

 

I've recently used this USB flash drive to install Windows on my Macbook Pro successfully. And I tried another brand of USB flash drive, but I got the same problem.

 

Any Help?  LonerT, my old friend??

iMac, OS X El Capitan (10.11.3)

Posted on Mar 5, 2016 11:06 PM

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mikenmar

Q: Error copying Windows 10 files to USB

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  • by mikenmar,

    mikenmar mikenmar Mar 7, 2016 6:21 PM in response to Loner T
    Level 1 (4 points)
    Windows Software
    Mar 7, 2016 6:21 PM in response to Loner T

    I see quite a few videos about opening up these machines -- can you recommend a particularly good/reliable one?

  • by Loner T,

    Loner T Loner T Mar 7, 2016 6:27 PM in response to mikenmar
    Level 7 (23,663 points)
    Safari
    Mar 7, 2016 6:27 PM in response to mikenmar

    The best guides I have found so far are on iFixit. You may want to consider VMware/Winclone method and clone a partially installed Windows Virtual Disk to a physical partition via Winclone.

  • by mikenmar,

    mikenmar mikenmar Mar 7, 2016 6:34 PM in response to Loner T
    Level 1 (4 points)
    Windows Software
    Mar 7, 2016 6:34 PM in response to Loner T

    OK, thanks I'll report back.

  • by skyglin,

    skyglin skyglin Jun 26, 2016 4:32 PM in response to mikenmar
    Level 1 (4 points)
    Jun 26, 2016 4:32 PM in response to mikenmar

    I have encounter almost the same problem as yours, after trying all different methods in this thread I have finally figured out it's an issue with the Fusion Drive.

     

    This problem is my fusion drive split into 2 separate drives in Disk Utility, and I found a reddit discussion board that help me recombine them back to one Fusion Drive.

     

    See below from p_darragh on this reddit discussion. Hope this helps!

     

    https://www.reddit.com/r/applehelp/comments/3b5q0t/my_fusion_drive_split_into_2_ separate_drives/

    p_darragh

    Most likely you removed the Core Storage settings when you reset the computer. To confirm, try doing diskutil cs list, and if you get back an error about "No Core Storage volumes found" (or something like that), then keep following from here. Otherwise, post back the output of diskutil list; diskutil cs list and we'll see what we can do.

    First, take inventory of your partitions with diskutil list. Identify the device identifiers of the two disks you want to combine. I'm going to assume they're /dev/disk0 and /dev/disk1.

    Then we create a new logical volume group:

    diskutil cs createLVG "LVG-1" /dev/disk0 /dev/disk1

    (Obviously change the name to something you'd prefer.)

    Now you need to create a logical volume within this LVG:

    diskutil cs createLV "LVG-1" HFS+J "My New Volume" 100%

    This creates a volume named "My New Volume" in the logical volume group "LVG-1", and takes up all of the available space.

    When you create an LVG from two different physical media that operate at different speeds (e.g. an SSD and a platter drive), OS X automatically infers that it should be used as a Fusion drive.

    Edit: Updated for compliance.

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