Cannot partition SSD on brand new Retina Pro (Yosemite)

Tony Danger

macrumors member
Original poster
Dec 19, 2014
65
17
I'm needing to install Windows via bootcamp, but cannot partition the drive. When trying to I get the following error:

"Partition failed with the error: This core storage operation is not allowed on a sparse logical volume group".

It seems I also have the dreaded FileVault bug, where it is stuck on paused, waiting for my power adapter to be plugged in all the time.




Is there a way round this without doing a full re-install of the machine? I'm not near my backup HDD at the moment, so it's out of the question.
 

Tony Danger

macrumors member
Original poster
Dec 19, 2014
65
17
I'm confused. None of that was relating to filevault bugging out and locking the drive and being unable to be turned off as far as I can see.

To be clear, I haven't upgrades, I have a brand new macbook pro retina that is about 2 weeks old, and I'm trying to make a 60gb partition in the drive to have a small Windows install.
 

h9826790

macrumors G5
Apr 3, 2014
13,998
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Hong Kong
#17 on that thread suggest run this code in terminal may fix the problem by turning off the core storage.

Code:
diskutil cs revert disk1
Worth a try.
 

Tony Danger

macrumors member
Original poster
Dec 19, 2014
65
17
#17 on that thread suggest run this code in terminal may fix the problem by turning off the core storage.

Code:
diskutil cs revert disk1
Worth a try.
Ah okay. Will that risk any data?


---

Edit - Isn't core storage to do with Fusion drives etc? I don't have them, I have the single 256Gb SSD that is formatted into one lump.
 
Last edited:

h9826790

macrumors G5
Apr 3, 2014
13,998
6,621
Hong Kong
Ah okay. Will that risk any data?

Edit - Isn't core storage to do with Fusion drives etc? I don't have them, I have the single 256Gb SSD that is formatted into one lump.
AFAIK, NO, but you should always have proper backup.

Core storage may have nothing to do with Fusion drives in Yosemite.

I've seen quite a few other posts has similar issue, you may search "diskutil cs revert" get the related threads. Read them through and then decide if you want to try this terminal command or not.
 

Tony Danger

macrumors member
Original poster
Dec 19, 2014
65
17
"Started CoreStorage operation on disk1 Macintosh HD
Error: -69666: This Core Storage operation is not allowed on a sparse logical volume group"



It's gonna be a format isn't it?
 

Fishrrman

macrumors Core
Feb 20, 2009
19,123
6,563
[[ It's gonna be a format isn't it? ]]

Looks like:
1. Backup
2. Disable CORE storage
3. Re-initialize
4. Restore.
 

Weaselboy

Moderator
Staff member
Jan 23, 2005
30,206
9,901
California
"Started CoreStorage operation on disk1 Macintosh HD
Error: -69666: This Core Storage operation is not allowed on a sparse logical volume group"



It's gonna be a format isn't it?
Enter the command below in Terminal then post the output up here so we can take a look at what is going on.

Code:
diskutil cs list
 

fahadmj

macrumors newbie
Mar 30, 2015
1
0
Enter the command below in Terminal then post the output up here so we can take a look at what is going on.

Code:
diskutil cs list
i have the same problem and this is my output

Name: Macintosh HD
Status: Online
Size: 499418034176 B (499.4 GB)
Free Space: 0 B (0 B)
|
+-< Physical Volume 52DCB850-8D33-4711-B160-A363F3B905A6
| ----------------------------------------------------
| Index: 0
| Disk: disk0s2
| Status: Online
| Size: 499418034176 B (499.4 GB)
|
+-> Logical Volume Family 6ADAD375-C635-4154-86BF-73250589F253
----------------------------------------------------------
Encryption Status: Unlocked
Encryption Type: AES-XTS
Conversion Status: Converting
Conversion Direction: forward
Has Encrypted Extents: Yes
Fully Secure: No
Passphrase Required: Yes
|
+-> Logical Volume 0D93BD3C-2E22-4CD8-AC2D-B7D2460F24C6
---------------------------------------------------
Disk: disk1
Status: Online
Size (Total): 499099238400 B (499.1 GB)
Conversion Progress: Paused
Revertible: No
LV Name: Macintosh HD
Volume Name: Macintosh HD
Content Hint: Apple_HFS
 

Weaselboy

Moderator
Staff member
Jan 23, 2005
30,206
9,901
California
i have the same problem and this is my output
Looks like it stopped or got stuck part way through encrypting with FileVault.

First make a full backup to a local (USB) disk with Time Machine, then option key boot to that backup disk. That will get you to a recovery screen. Then launch Terminal from the Utilities menu and enter the command below to wipe the drive. Make sure you enter it exactly like this including the quotes.

Code:
diskutil cs delete "Macintosh HD"
Then quit Terminal and start Disk Utility. Go to the erase tab and select the internal drive and format to Mac OS Extended (Journaled). Then quit Disk Util and click restore and the OS and all your data will be moved from the backup disk to the internal drive.

Then restart afterward and you should be back to normal with a drive partition that can be resized as needed.
 

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