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Fusion Drive - No CoreStorage logical volume groups found

J

Jaymon27

macrumors newbie
Original poster
Dec 19, 2018
3
0
Hey!

I'm trying to split a Fusion Drive. Note I've heard the warnings; no need to advise me against it. I know what I'm doing and I have backups of everything if things go horribly wrong.

Anyhow, I am following this article which states to type 'diskutil coreStorage list' into terminal while in recovery mode, and it'll output a long string of details including a UUID you need for the next step.

Problem is that I simply get a 'No CoreStorage logical volume groups found' return message.

The computer is a 2012 iMac with a 1TB fusion drive, running 14.2. I got shunned away over on the Apple community forums saying I shouldn't be doing this, so I'm trying here. Thanks for reading, any help is greatly appreciated!!
 
If you're running Mojave (10.14.2) as you stated, your Fusion drive has been converted to APFS, hence, no CoreStorage. Which is why you're receiving that return message from Terminal.
 
chscag said:
If you're running Mojave (10.14.2) as you stated, your Fusion drive has been converted to APFS, hence, no CoreStorage. Which is why you're receiving that return message from Terminal.
Click to expand...
Ok thanks very much for that info, I thought something was wrong. Do you know how I'll go about the next steps?
 
Post what you get from 'diskutil apfs list'. What you can do is just find the bsd names, likely disk0 and disk1, and unmount them with 'diskutil unmountdisk force disk0' and the same thing for disk1, then erase them individually in terminal.
 
BLUEDOG314 said:
Post what you get from 'diskutil apfs list'. What you can do is just find the bsd names, likely disk0 and disk1, and unmount them with 'diskutil unmountdisk force disk0' and the same thing for disk1, then erase them individually in terminal.
Click to expand...

I'm having the exact issue as OP, so here's what I got from 'diskutil apfs list'. What do I do next? Please and thanks!

Last login: Fri Apr 10 12:57:18 on console


robs-air:~ robmcnelis$ diskutil cs list


No CoreStorage logical volume groups found


robs-air:~ robmcnelis$ diskutil apfs list


APFS Container (1 found)


|


+-- Container disk2 41800DEE-B7BB-4A4A-9C57-656FA525E281


====================================================


APFS Container Reference: disk2 (Fusion)


Size (Capacity Ceiling): 248778768384 B (248.8 GB)


Capacity In Use By Volumes: 103911620608 B (103.9 GB) (41.8% used)


Capacity Not Allocated: 144867147776 B (144.9 GB) (58.2% free)


|


+-< Physical Store disk0s2 1AEC83A8-ACF9-4BBD-9EB3-D636D1EF4000


| -----------------------------------------------------------


| APFS Physical Store Disk: disk0s2 (Main)


| Size: 121123069952 B (121.1 GB)


|


+-< Physical Store disk1s2 946570F2-FA12-4155-AC17-D4CEC9EC5F27


| -----------------------------------------------------------


| APFS Physical Store Disk: disk1s2 (Secondary, Designated Aux Use)


| Size: 127655698432 B (127.7 GB)


|


+-> Volume disk2s1 0CE817F5-A4AF-38A7-9E2C-F1589D56F7FA


| ---------------------------------------------------


| APFS Volume Disk (Role): disk2s1 (No specific role)


| Name: Macintosh HD (Case-insensitive)


| Mount Point: /


| Capacity Consumed: 92468748288 B (92.5 GB)


| FileVault: No


|


+-> Volume disk2s2 CA6844E0-A9B6-4ACC-B933-E89BA6D671E5


| ---------------------------------------------------


| APFS Volume Disk (Role): disk2s2 (Preboot)


| Name: Preboot (Case-insensitive)


| Mount Point: Not Mounted


| Capacity Consumed: 43634688 B (43.6 MB)


| FileVault: No


|


+-> Volume disk2s3 59668339-43FB-4192-8E6D-6F40E5B52681


| ---------------------------------------------------


| APFS Volume Disk (Role): disk2s3 (Recovery)


| Name: Recovery (Case-insensitive)


| Mount Point: Not Mounted


| Capacity Consumed: 509726720 B (509.7 MB)


| FileVault: No


|


+-> Volume disk2s4 3C3E09A7-935D-49AF-B021-B079E0A97C31


---------------------------------------------------


APFS Volume Disk (Role): disk2s4 (VM)


Name: VM (Case-insensitive)


Mount Point: Not Mounted


Capacity Consumed: 2147504128 B (2.1 GB)


FileVault: No
 
Rob587 said:
I'm having the exact issue as OP, so here's what I got from 'diskutil apfs list'. What do I do next? Please and thanks!

Last login: Fri Apr 10 12:57:18 on console


robs-air:~ robmcnelis$ diskutil cs list


No CoreStorage logical volume groups found


robs-air:~ robmcnelis$ diskutil apfs list


APFS Container (1 found)


|


+-- Container disk2 41800DEE-B7BB-4A4A-9C57-656FA525E281


====================================================


APFS Container Reference: disk2 (Fusion)


Size (Capacity Ceiling): 248778768384 B (248.8 GB)


Capacity In Use By Volumes: 103911620608 B (103.9 GB) (41.8% used)


Capacity Not Allocated: 144867147776 B (144.9 GB) (58.2% free)


|


+-< Physical Store disk0s2 1AEC83A8-ACF9-4BBD-9EB3-D636D1EF4000


| -----------------------------------------------------------


| APFS Physical Store Disk: disk0s2 (Main)


| Size: 121123069952 B (121.1 GB)


|


+-< Physical Store disk1s2 946570F2-FA12-4155-AC17-D4CEC9EC5F27


| -----------------------------------------------------------


| APFS Physical Store Disk: disk1s2 (Secondary, Designated Aux Use)


| Size: 127655698432 B (127.7 GB)


|


+-> Volume disk2s1 0CE817F5-A4AF-38A7-9E2C-F1589D56F7FA


| ---------------------------------------------------


| APFS Volume Disk (Role): disk2s1 (No specific role)


| Name: Macintosh HD (Case-insensitive)


| Mount Point: /


| Capacity Consumed: 92468748288 B (92.5 GB)


| FileVault: No


|


+-> Volume disk2s2 CA6844E0-A9B6-4ACC-B933-E89BA6D671E5


| ---------------------------------------------------


| APFS Volume Disk (Role): disk2s2 (Preboot)


| Name: Preboot (Case-insensitive)


| Mount Point: Not Mounted


| Capacity Consumed: 43634688 B (43.6 MB)


| FileVault: No


|


+-> Volume disk2s3 59668339-43FB-4192-8E6D-6F40E5B52681


| ---------------------------------------------------


| APFS Volume Disk (Role): disk2s3 (Recovery)


| Name: Recovery (Case-insensitive)


| Mount Point: Not Mounted


| Capacity Consumed: 509726720 B (509.7 MB)


| FileVault: No


|


+-> Volume disk2s4 3C3E09A7-935D-49AF-B021-B079E0A97C31


---------------------------------------------------


APFS Volume Disk (Role): disk2s4 (VM)


Name: VM (Case-insensitive)


Mount Point: Not Mounted


Capacity Consumed: 2147504128 B (2.1 GB)


FileVault: No
Click to expand...

Did you ever make any progress on this?
 
Jaymon27 said:
Hey!

I'm trying to split a Fusion Drive. Note I've heard the warnings; no need to advise me against it. I know what I'm doing and I have backups of everything if things go horribly wrong.

Anyhow, I am following this article which states to type 'diskutil coreStorage list' into terminal while in recovery mode, and it'll output a long string of details including a UUID you need for the next step.

Problem is that I simply get a 'No CoreStorage logical volume groups found' return message.

The computer is a 2012 iMac with a 1TB fusion drive, running 14.2. I got shunned away over on the Apple community forums saying I shouldn't be doing this, so I'm trying here. Thanks for reading, any help is greatly appreciated!!
Click to expand...
Everything is probably fine, make sure to follow these instructions before you go and do anything. https://support.apple.com/en-us/HT207584
 
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