I answered your original question; now you're bringing up another one. I suggest you start a new thread to address it, if you can't find a solution by searching the site. Below are revised instructions for solving the problem raised in your first question.
Apple has not provided an easy way to recover from this condition. Please read this whole message before doing anything. If you don't feel able to carry out the instructions, get someone more experienced to help you. One option is to make a "Genius" appointment at an Apple Store.
This procedure applies only to an iMac or Mac mini with a factory-installed Fusion Drive.
You'll need to refer to these instructions while no web browser is running, so either print them or load them on another device before you begin.
1. You need at least two complete, independent backups of all data before proceeding. One backup is not enough to be safe. There are ways to back up a computer that isn't fully functional. Ask if you need guidance.
2. Disconnect all external storage devices.
3. Start up in Internet Recovery mode by holding down the key combination command-option-R at the startup chime. Release the keys when you see a spinning globe. Select a language, if prompted.
Note: You need an always-on Ethernet or Wi-Fi connection to the Internet to use Recovery. It won’t work with USB or PPPoE modems, or with proxy servers, or with networks that require a certificate for authentication.
4. In the OS X Utilities screen, select Get Help Online. Safari will launch. While in Recovery, you'll have no access to your bookmarks, but you won't need them. Load this web page.
5. Triple-click anywhere in the line below to select it:
diskutil cs deleteLVG `diskutil cs list | awk 'NR==3{print $NF}'`
Copy the selected text to the Clipboard by pressing the key combination command-C.
Quit Safari. You'll be returned to the OS X Utilities screen.
6. From the menu bar, select
Utilities ▹ Terminal
The Terminal application will launch. Paste into the Terminal window by pressing the key combination command-V. Wait for a new line ending in a hash sign (#) to appear. If nothing happens, press the return key.
Quit Terminal to be returned to the main screen.
This operation will remove all data from the Fusion Drive, so you had better be sure of your backups.
What happens next depends on what version of OS X came preinstalled on your model (and therefore, which version of Disk Utility is included in Internet Recovery):
☞ If the machine came with OS X 10.10 ("Yosemite") or an older version, please take Step 7a and skip Step 7b.
☞ If it came with OS X 10.11 ("El Capitan") or a newer version, go to Step 7b.
☞ If you don't know what version of OS X the machine came with, try Step 7a first, and if it doesn't work, go to Step 7b.
After taking whichever of those steps is applicable, you should have a Fusion Drive named "Macintosh HD" on which you can carry out either Step 8 or Step 9.
7a. Repair the Fusion Drive (see under "Troubleshooting" on the linked page.) Quit Disk Utility.
7b. Enter the command below as in Steps 4-6:
N=Macintosh\ HD; diskutil cs create "$N" disk0 disk1 && diskutil cs createLV "$N"
jhfs+ "$N" 100%
Quit Terminal.
8. If you have a Time Machine backup, connect the backup device and restore your data. If you backed up to a network device such as a Time Capsule, it should be connected automatically.
9. If you don't have a Time Machine backup, or if you can't restore from the Time Machine backup that you do have, install OS X. Restore the data afterwards in Migration Assistant.
In Internet Recovery mode, you'll be installing the original version of OS X that shipped with the machine. If you've upgraded the OS in the App Store, and you want to install the latest version, then restart in local Recovery mode by holding down the key combination command-R (not the option key) at the startup chime. When you install the OS, you'll be prompted for the Apple ID and password that you used to upgrade.
