Partitions messed up trying to bootcamp

[iHateMacs]

Hi,

I have spent the last 9 hours+ sat in front of my iMac trying to install Windows 10.

I won't list all the problems but my current problem is, space I had allocated to Bootcamp now seems to be missing.

Bootcamp says "The startup disk cannot be partitioned or restored o a single partition"

I have tried Repair, from the Disk Util in recovery but that was no help.

Currently my partitions look like this below.

What partitions SHOULD I have for a late 2013 iMac with a 3TB Fusion drive on El Capitan? I seem to have loads here. Are there any I can delete?

Thanks

 

[valdikor]

You're not alone. I have recently been trying to install Windows on my 2014 Retina iMac with a 3TB Fusion Drive and I wasted a good portion of the weekend. First, Boot Camp Assistant would not finish partitioning the disk, it just hung. I had to force quit BCA and then boot to Internet Recovery to restore my disk space. After about five tries with different partition sizes it would actually finish but I had to shrink the Windows partition size to about 200 GB, anything above would just hang. And then, when I finally got to the Windows installer, it would not install on the assigned partition. I tried many times, formatted the partition multiple times, rebooted, to no effect. Then I finally gave up, decided to restore the drive back to a singe partition - and that left my drive split in two parts, as if the Fusion Drive was no longer... fused. So I made an El Capitan USB installer, wiped the drive, completely recreated the Fusion Drive using Terminal commands and restored the computer off a Time Capsule backup (which took more than a day!). I learned the hard way never again to attempt installing Windows on my iMac.
Sorry my post wasn't really helpful. If nothing else, you may restore the drive back to how it was before if you have a complete TM backup.

 

[iHateMacs]

That is about what I did in the end.

I used the Windows installer to completely remove the partitions then let the Mac recovery DiskUtil reform the fusion drive. Restored to mavericks online, then updated to El Capitan then did a complete restore from my time machine.

I then used a mac-air to install windows 10 on bootcamp, used Winclone to make a copy, then used bootcamp again on the imac and then used Winclone to put the copy back onto the iMac expanding the 50gb bootcamp form the air to 150gb on the iMac

It all worked fine in the end. The issue was me removing the partition created by bootcamp. That is a good lesson learnt.