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Some time ago I showed you how to make a Create Fusion Drive can, and now I thought that some users of the Apple Mac, iMac or MacBook want to disconnect or undo the Fusion Drive. The following instructions are intended for this purpose. If you want to dissolve the Fusion Drive, i.e. use the HDD hard drive and SSD hard drive separately again, then I hope that the steps outlined below will help you.
Before you carry out the steps described below on your Apple Mac, you should definitely make a backup, i.e. move all your data from the SSD and HHD hard drive to an external hard drive, to the cloud and / or to other storage media! Because dissolving the Fusion Drive on the Apple Mac ensures that all data and files are deleted from the SSD and HDD. Without the backup, they are then irretrievably lost. Also keep in mind that after disconnecting the Fusion Drive, you will have to reinstall the system and programs and make new settings.
As is always the case with such system matters, everything is not straightforward and is seldom easy to understand. However, I will try to explain the individual steps to you Undo Fusion Drive as clearly as possible.
First, we check whether your Fusion Drive is external and the operating system itself is stored on an internal disk - or whether the two internal hard disks have been connected to form a Fusion Drive. If the disk network is external and the OS is on a separate disk, the Mac will start normally. If the internal plates are connected to a unit, then press the CMD key and R at the same time when the Apple Mac starts up. CMD + R puts the computer in the so-called Recovery mode.
In the first step you start the terminal in order to track down the two individual components of the storage group. Have you opened the terminal, you give the command discuss the coreStorage list a. After confirming the individual hard drives (Physical volume) in the corresponding group (Logical Volume Group) is displayed. The first entry is “+ - - Logical Volume Group long number“Mark the long identification number and copy it (CMD + C).
In step two you give the command in the terminal discussil coreStorage delete UUID long number a. The abbreviation UUID stands for the identification number that you have copied and which you can now paste into the command instead of the “long number”. Attention: If you now confirm the command, the Fusion Drive will be dissolved and both hard drives will be formatted, i.e. deleted. If that's okay, then confirm the command. Finished.
Great, now you have an expensive Mac standing around, but you can't do anything with it. Because after dissolving the Fusion Drive, the hard drives are empty and even the recovery partition for the new installation of the Apple operating system macOS is gone. Now, if you want to use the Mac or iMac again, you have to feed the OS from an external source. On the one hand, this works via an internet connection; even easier but with a macOS boot stick. You will learn how to create such a bootable USB stick in this manual. Too heavy Then use the app Boot buddy.
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After graduating from high school, Johannes completed an apprenticeship as a business assistant specializing in foreign languages. But then he decided to research and write, which resulted in his independence. For several years he has been working for Sir Apfelot, among others. His articles include product introductions, news, manuals, video games, consoles, and more. He follows Apple keynotes live via stream.