Manual Fusion Drive Mac

Fusion Drive, a storage option on some iMac and Mac mini computers, combines a hard drive and flash storage in a single volume for improved performance and storage capacity. If your Fusion Drive appears as two drives instead of one in the Finder, it's no longer working as a Fusion Drive. This can happen after replacing either drive of your Fusion Drive, or using software to intentionally split them into separate volumes.

  1. Manual Fusion Drive Mac 2017
  2. 1tb Fusion Drive Mac
  3. Fusion Drive Space Ship
  4. Manual Fusion Drive Mac Os Mojave
Fusion

Jul 17, 2017  Fusion Drive became available as an option for iMac and Mac mini models introduced in late 2012. Fusion Drive now comes standard on some iMac and Mac mini models, and is a configurable option on others. For even faster performance, you can configure a. Fusion Drive became available as an option for iMac and Mac mini models introduced in late 2012. Fusion Drive now comes standard on some iMac and Mac mini models, and is a configurable option on others. For even faster performance, you can configure a model that uses only flash storage (SSD).

You can continue using the two drives independently, or follow these steps to regain the benefits of having the single logical volume of a Fusion Drive.

Before you begin

If you're not sure that your Mac was configured with a Fusion Drive, or that the drive has been split:

  1. Disconnect any external storage devices from your Mac.
  2. Choose Apple () menu > About This Mac, then click Storage.
    • If you see a drive labeled Fusion Drive, your Fusion Drive is working and this article doesn't apply to you.
    • If you have a Fusion Drive that has been split, you should see two drives. One of them should be labeled Flash Storage, with a capacity of 24GB, 32GB, or 128GB. The other should be at least 1TB.

Manual Fusion Drive Mac 2017

Use Terminal to create a Fusion Drive again

1tb Fusion Drive Mac

These steps permanently delete all data stored on the drives that make up your Fusion Drive. Make sure that you have a backup before continuing.

If you're using macOS Mojave

Fusion Drive Space Ship

  1. Turn on your Mac, then immediately press and hold Command-R to start up from macOS Recovery. Release the keys when you see the Apple logo or spinning globe.
  2. When you see the macOS Utilities window, choose Utilities > Terminal from the menu bar.
  3. Type diskutil resetFusion in the Terminal window, then press Return.
  4. Type Yes (with a capital Y) when prompted, then press Return.
  5. When Terminal indicates that the operation was successful, quit Terminal to return to the macOS Utilities window.
  6. Choose Reinstall macOS, then follow the onscreen instructions to reinstall the Mac operating system. Your Mac restarts from your Fusion Drive when done.

If you're using macOS High Sierra or earlier

  1. Turn on your Mac, then immediately press and hold Command-R to start up from macOS Recovery. Release the keys you see the Apple logo or spinning globe.
  2. When you see the macOS Utilities window, choose Utilities > Terminal from the menu bar.
  3. Type diskutil list in the Terminal window, then press Return.
  4. Terminal displays a table of data about your drives. In the IDENTIFIER column, find the identifier for each of the two internal, physical drives that make up your Fusion Drive. Usually the identifiers are disk0 and disk1. One of them should be 128GB or less in size. The other at least 1TB in size.
  5. Type the following command, replacing identifier1 and identifier2 with the identifiers you found in the previous step. Then press Return.

    Example: diskutil cs create Macintosh HD disk0 disk1
    If you get a disk unmounting error, enter diskutil unmountDisk identifier, using the first identifier you gathered previously. Then enter same command again using the second identifer.

  6. Type diskutil cs list, then press Return.
  7. Terminal displays additional data about your drives (volumes). Find the string of numbers that appears after ”Logical Volume Group” for the volume named Macintosh HD. It's a number like 8354AFC3-BF97-4589-A407-25453FD2815A.
    Example:
    +-- Logical Volume Group 8354AFC3-BF97-4589-A407-25453FD2815A
    |
    | Name: Macintosh HD
  8. Type the following command, replacing logicalvolumegroup with the number you found in the previous step. Then press Return.

    Example: diskutil cs createVolume 8354AFC3-BF97-4589-A407-25453FD2815A jhfs+ Macintosh HD 100%

  9. When Terminal indicates that the operation was successful, quit Terminal to return to the macOS Utilities window.
  10. Choose Reinstall macOS, then follow the onscreen instructions to reinstall the Mac operating system. Your Mac restarts from your Fusion Drive when done.

Hi. I need to fresh install macOS but the Fusion drive (2TB model with 128 SSD in it), after a Boot Camp mess up, has partitions that can't be erased and merged. There is no minus sign on the partition with the * which is the Windows Reserved and the partition which used to be Boot Camp (120+ GB):

Manual Fusion Drive Mac Os Mojave



I've made already a USB macOS flash drive installer and would like to erase/delete all partitions, format Fusion drive to pristine and install a fresh macOS Sierra (will just restore documents with Time Machine) and start from scratch.


Mac

Thank you in advance. Merry Christmas and a Happy New Year. God bless. Proverbs 31

iMac, macOS Sierra (10.12.1), iMac (Late 2015)

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