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Fusion 3TB and Bootcamp

solomanii

solomanii

macrumors member
Original poster
Dec 6, 2012
68
1
Hi all, I have a 27" 2013 iMAC (at least I bought it this year, not sure on exact model). It has a 3TB Fusion drive. Trying to use boot-camp to create a windows partition but I keep getting this error:

2JtKAA4.png


g4BVGGd.png


The other odd thing is I cant make the partition bigger. Its fixed at 20gb or 0gb. I have run permission check/repair as well as disk check which found no errors. I also have the latest version of OSX Mountain Lion so it should work.

I see these errors in the console. Saying there is not enough space when clearly there is (300gb free)


9/18/13 10:25:01.000 PM kernel[0]: hfs_truncatefs: insufficient space (need 200578798 blocks; have 98252775 free blocks)

9/18/13 10:25:01.256 PM Boot Camp Assistant[18663]: NSAlert is being used from a background thread, which is not safe. This is probably going to crash sometimes. Break on void _NSAlertWarnUnsafeBackgroundThreadUsage() to debug. This will be logged only once. This may break in the future.
Click to expand...

I am tempted to just create the partition in Disk Utility and then manually install Win 7. But hesitant to touch it if Boot Camp is complaining until I know more.

Open to other suggestions.

Thanks in advance.
 
I'm not 100% sure but from what I've read Boot Camp uses a hybrid mbr partition table in conjunction with the GUID partition table.
Sadly mbr is limited to 4 partitions and has difficulty booting from a drive bigger than 2TB.
If I'm correct this is going to become a problem with these larger drives.

Maybe do some googling on that for confirmation.
 
Quackers said:
I'm not 100% sure but from what I've read Boot Camp uses a hybrid mbr partition table in conjunction with the GUID partition table.
Sadly mbr is limited to 4 partitions and has difficulty booting from a drive bigger than 2TB.
If I'm correct this is going to become a problem with these larger drives.

Maybe do some googling on that for confirmation.
Click to expand...
The situation with Boot Camp and 3TB disks is more complex than that, but it should work fine as long as the computer is on 10.8.3 or later, and be transparent to the end user.
What the Boot Camp assistant does is to create a Core Storage volume– not unlike a Fusion drive, making sure the Windows partition is within the first 2.2TB of the disk, then making one Mac volume out of the remaining partitions on the disk.

----------
solomanii said:
I see these errors in the console. Saying there is not enough space when clearly there is (300gb free)
Click to expand...

You may not have enough contiguous free space for the Boot Camp assistant to move the files around to make room for repartitioning. Do you have another disk you can use temporarily to copy off your data?
 
chrfr said:
The situation with Boot Camp and 3TB disks is more complex than that, but it should work fine as long as the computer is on 10.8.3 or later, and be transparent to the end user.
What the Boot Camp assistant does is to create a Core Storage volume– not unlike a Fusion drive, making sure the Windows partition is within the first 2.2TB of the disk, then making one Mac volume out of the remaining partitions on the disk.

----------



You may not have enough contiguous free space for the Boot Camp assistant to move the files around to make room for repartitioning. Do you have another disk you can use temporarily to copy off your data?
Click to expand...


I do and will try! Thanks. Actually will a defrag help by chance?
 
solomanii said:
I do and will try! Thanks. Actually will a defrag help by chance?
Click to expand...
It's possible. I've had mixed results when trying to get a Boot Camp partition created on a disk that's been used for a while.
 
chrfr said:
It's possible. I've had mixed results when trying to get a Boot Camp partition created on a disk that's been used for a while.
Click to expand...

Defrag and moving 500gb off didn't help. Defrag gave the same error. After moving files it actually partitioned but ran for a day before I killed it and gave up.

In the process of backing up and wiping it and then partitioning from the get go.

Will update further when done.

Thanks for your help.
 
I don't think Bootcamp can be installed on a Fusion Drive. I know it can't on a RAID 0 volume, and while RAID and Fusion are quite different, they have the same characteristic that the volume is a combination of two physical drives appearing as a single logical volume.

Parallels is much better than most people think, and is completely compatible with FDs (I have Parallels on an FD).

EDIT....The above is completely incorrect....see

http://support.apple.com/kb/HT5639?viewlocale=en_US&locale=en_US
 
Yes. I was about to say since I just did it :)

I did have to wipe my machine and do the partition and setup on the raw build. I had to do this because after 6m of usng the iMac, even with 500g to spare, there wasn't enough contingous space to do the setup.
 
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