Presented as a single volume on your Mac, Fusion Drive automatically and dynamically moves frequently used files to Flash storage for quicker access, while infrequently used items move to the hard disk. As a result you'll enjoy shorter startup times, and as the system learns how you work you'll see faster application launches and quicker file access. Fusion Drive manages all this automatically in the background.
Frequently Asked Questions
1. Do I need to configure Fusion Drive?
When ordered with a Fusion Drive, your iMac or Mac mini is pre-configured.
2. Can external USB, FireWire, or Thunderbolt hard drives be added to Fusion Drive?
External drives cannot be added to Fusion Drive. 外接硬碟不能用為融合碟Fusion Drive
3. Can I add a partition to the hard disk with Fusion Drive?
Using Disk Utility, you can add one partition to the hard disk on Fusion Drive. Once you add the partition, the "plus" symbol in Disk Utility to add additional partitions will be grayed out. You cannot partition the Flash storage. 可以做分割磁區，但只能在硬碟分割一區，在SSD不可分割。
4. If I create a hard disk partition is it part of Fusion Drive?
The additional partition is not part of Fusion Drive. The new partition is a separate volume that is physically located on the hard disk drive. 若分割，就是獨立運作的傳統硬碟，不再是融合碟的一部分。
5. Can I add a Windows partition?
You can create one additional partition on the hard disk with Fusion Drive. You can create either a Mac OS X partition or a Windows partition.
If creating a Windows partition, use Boot Camp Assistant to create it, not Disk Utility. From the Go menu, choose Utilities. Then, double-click Boot Camp Assistant and follow the onscreen instructions. For more information on Boot Camp see the Boot Camp support page. 若分割，分割區可為Windows (用 Boot Camp Assistant，但3TB硬碟不能)或Mac。
Note: Boot Camp Assistant is not supported at this time on 3TB hard drive configurations.
7. I receive a "disk is too small for this operation" message when creating a partition. Why?
The partition you are trying to create has a larger size than free space available on the hard disk drive. Reduce the size of the partition you are trying to create and try again.
8. Can a Fusion Drive be mounted on another system in Target Disk Mode?
Yes, but the system attempting to mount the Fusion Drive in Target Disk Mode must have OS X Mountain Lion version 10.8.2 or later. A Fusion Drive will not appear as a Target Disk Mode volume or startup disk on earlier versions of Mac OS X. 支援配備至少Mac OS X 10.8.2以上的Mac使用Fusion Drive成為Target Disk Mode。
9. Can third-party disk utilities be used with a Fusion Drive?
Third party disk utilities may or may not work with a Fusion Drive. Check with the third-party software vendor to check for compatibility with a Fusion Drive.
10. I'm using video capture software and it reports frame drops during sustained captures. What could be wrong?
Your project's capture requirements may exceed the sustained capture rate available to your Fusion Drive. Try capturing a smaller segment of the source or reduce its resolution.
11. I've recently reset NVRAM (Non-Volatile Random Access Memory, also known as PRAM) and now my Fusion Drive is starting up more slowly. How can I fix this?
The reset removed your Startup Disk setting from NVRAM. To access the setting, choose System Preferences from the Apple () menu. Then, click Startup Disk and then Macintosh HD. Note: You may have to click the lock icon at the bottom of the window and enter your system administrator password to manage this setting.
Additional Information
Troubleshooting
The version of Disk Utility that comes with Fusion Drive is unique. Earlier versions of Disk Utility can't be used with a Fusion Drive.
If your system will not start because you see a flashing question mark or another alert:
1. Press the Power button and hold it down to power off your system.
2. Press the Power button again. After you hear the startup chime, press and hold Command-Option-R to start up to the Internet version of Mountain Lion Recovery.
3. A globe should appear with a "Starting Internet Recovery" message. It is now OK to release Command-Option-R.
4. A progress bar should appear and Internet Recovery should start ask you to select a language.
5. Once you select a language, click Disk Utility in the window that appears and then click Continue.
6. If your Fusion Drive can be repaired with Disk Utility, you'll see a Disk icon with red lettering. Click the disk icon.
7. To repair the volume, click Fix. CAUTION: Clicking Fix will erase your Fusion Drive. If you have a Time Machine backup of your Fusion Drive Mac, see Mac 101: Time Machine for information on how to restore from a Time Machine backup once the drive has been erased.
8. After the repair is complete, the volume will change color to black. Quit Disk Utility, click Install Mac OS X, then click Continue to reinstall OS X Mountain Lion.
Important: Information about products not manufactured by Apple is provided for information purposes only and does not constitute Apple’s recommendation or endorsement. Please contact the vendor for additional information.
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