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Does anyone else get the following message when trying to use boot camp on new 3tb iMac

The startup disk cannot be partitioned or restored to a single partition.

OS X Mountain Lion (10.8.3)

Posted on Mar 17, 2013 10:24 AM

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37 replies

Sep 8, 2013 1:57 PM in response to S_eye

This is an iMac 27", late 2012, I7, 16mb ram, 3TB SATA HD, with all the latest updates, as earlier indicated. The drive has only one partition and, aside from adding and deleting partitions as troubleshooting measures suggested by Apple. it has only ever had one partition. Let me know if you need any other specs.


I received this machine last March, before the release of 10.8.3, so my first attempt to use BootCamp to migrate my Winclone image (i know it's more complicated than that, but so far the point is moot) was simply not possible because of the whole 3TB drive issue that 10.8.3 was supposed to fix.

Sep 9, 2013 8:33 AM in response to Spotnik

It is a configuration very similar to the one I have.

The trouble here is that since MBR partitioning can addresse sisk up to 2.2Gb, you have to force the Windows installation over GPT (GUID partition table), which in theory is supported only by 64bits versions of windows


I had limited success by manually partitioning the 3Tb hard disk and installing Windows 7 on it.

My problem is the windows installation crashes in the middle.

I still have eveidences that the windows installer left files in the partition.


I hope that Mavericks will solve the problem once for all.

Sep 10, 2013 8:50 AM in response to S_eye

Thanks. Yes, I'm well aware of the 2.2 TB limitation, but I wasn't clear on the actual reason for that.


Earlier on, I did attempt a manual partition of the drive, and Disk Utiltity did something totally bizarre that left me with a 750 GB startup partition and 2.25 TB of unusable, unrecognizable space. This was within days of getting this particular machine, it was fairly easy to fix through tech support, but it sort of put me off of trying to do anything manually (especially since BootCamp was intended to make all of that unnecessary.)


Yes, I hope someone comes up with a fix too.

Sep 10, 2013 10:53 AM in response to Spotnik

Does anybody know if it's possible to merge two partitions on the same drive into a RAID in disk utility?

Since I can't get this stupid 3TB drive to work with Boot Camp assistant, maybe I could manually partition the drive into three segments, but merge segments 1 and 3 into a single drive with RAID? Like this:


Part 1 - 500 GB for OSX system and such

Part 2 - 500 GB for Windows

Part 3 - 2 TB for everything else


Then could I use a concatenated RAID to make Part 1 and Part 3 work up as a single volume?

Does anyone else get the following message when trying to use boot camp on new 3tb iMac

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