How to split up a Fusion Drive
Posted 28 November 2012 - 11:39 AM
So I undid them and now things are back to normal. Oh well, there are worse ways to spend a cold Saturday afternoon.
Posted 28 November 2012 - 12:41 PM
Posted 28 November 2012 - 01:27 PM
Posted 28 November 2012 - 02:21 PM
You can add one partition with boot camp assistant or disk utility. It's apportioned from the HDD in an SSD/HDD combination and you cannot choose which device or where on the device you want the new partition, though it should typically appear at the end of the HDD.
Posted 28 November 2012 - 03:01 PM
If you want to partition a portion of the larger drive away from the Fusion drive, you can do so by partitioning the drive before you create the fusion drive.
Then, when creating the Fusion Drive, rather than using the mount point to choose the partitioned drive (/dev/disk#) choose the volume identifier, which look like this:
You can see these when you type "diskutil list" into the terminal. So you can combine an entire disk such as your SSD with a partition on your HDD if you want to manage a portion of it separately.
Posted 30 November 2012 - 08:22 AM
Posted 01 December 2012 - 01:43 PM
This is expected behavior. If you have another type of Core Storage volume, say, a FileVault encrypted volume (whole disk encrypted, Lion or Mountain Lion) - you can't create a Recovery Drive partition on it either -- it can't be resized, which is necessarily a part of the process.
I ran across this when attempting to use Carbon Copy Cloner to clone my boot drive's Recovery Drive partition, to a new external drive intended to be a clone of my boot drive, which I'd already formatted as Encrypted. The solution was to use Disk Utility to erase the drive, reformatting it as a single regular JHFS+ (non-encrypted) volume, then use CCC to clone the Recovery Drive partition onto it (in the process, shrinking the non-encrypted Finder-visible volume), and then finally after doing that, erasing it again, choosing Extended (Journaled, Encrypted).
Lesson being, it seems that Core Storage volumes - whether Journaled & Encrypted, or in your case, Fusion - can't be resized in place -- the way traditional non- Core Storage volumes can be.
Posted 21 December 2012 - 06:12 AM
had u used the mac pro with the ssd as boot drive before setting up the fusion drive??? didn't that go just as fast?
Posted 22 December 2012 - 12:36 PM
- Could i be able to upgrade the 128 SSD to a 256 eventuall?
they went from a 256SSD to a 128, this makes me really angry!
I'm pretty sure you're allowed to replace your hard drive yourself, it I haven't looked into it so don't take my word on it. I would recommend asking apple if its ok to replace your hard drive while under warranty.
You can upgrade to a larger SSD which could give you the ability to move huge amounts of files very fast, but I think the increase in performance with a larger SSD in a fusion drive is negligible after a certain point. However upgrading will mean having to wipe the data from both drives, recreating the CoreStorage volume and then moving your data back.