Can't delete OS X Yosemite beta partition

afsnyder · Nov 28, 2014

I created a partition when I was running OS X Yosemite beta. Now I can't seem to delete or resize the partitions.

Anyone know what I can do to delete it? I've tried erasing it and repairing the disk. Neither has helped. I've attached a screenshot.

simonsi · Nov 28, 2014

Likely its been changed to Core Storage as part of the Yosemite install, you will need to run a couple of terminal commands to remove the CS Logical Groups and Volumes before DU can re-partition/erase etc.

I don't have the commands to hand but I'm sure a search on here will find them...

asriznet · Nov 28, 2014

You may want to have a look at the following article - http://awesometoast.com/yosemite-core-storage-and-partition-woes/

It seems that Yosemite tends to convert the boot partition into a corestorage volume, so you need to put in terminal command to revert it back.

no data loss should occur but just to be safe, do a backup before performing this.

Weaselboy · Nov 28, 2014

afsnyder said:
I created a partition when I was running OS X Yosemite beta. Now I can't seem to delete or resize the partitions.

Anyone know what I can do to delete it? I've tried erasing it and repairing the disk. Neither has helped. I've attached a screenshot.

Disconnect any other drives, then run the command below to turn off core storage on the drive then you should be able manipulate normally in Disk Util.

Code:

diskutil cs revert /

afsnyder · Nov 28, 2014

So I ran this in terminal to try and fix it..

Code:

diskutil corestorage revert B1F66C16-978D-452C-9D9C-CB3E14C8BDFD

I then get this error:

Code:

Started CoreStorage operation on disk2 OS X Yosemite
Error: -69741: The target disk isn't eligible for reversion because it wasn't created by conversion or it is not part of a simple setup of exactly one logical and one physical volume

What else can I do?

asriznet · Nov 28, 2014

afsnyder said:

So I ran this in terminal to try and fix it..

Code:

diskutil corestorage revert B1F66C16-978D-452C-9D9C-CB3E14C8BDFD

I then get this error:

Code:

Started CoreStorage operation on disk2 OS X Yosemite
Error: -69741: The target disk isn't eligible for reversion because it wasn't created by conversion or it is not part of a simple setup of exactly one logical and one physical volume

What else can I do?

Based on your screenshot, "Macintosh HD" was converted as an LVG but the error is on "OS X Yosemite"

Can you post the result of:

Code:

diskutil cs list

afsnyder · Nov 28, 2014

asriznet said:
Based on your screenshot, "Macintosh HD" was converted as an LVG but the error is on "OS X Yosemite"

Can you post the result of:

Code:

diskutil cs list

Code:

CoreStorage logical volume groups (2 found)
|
+-- Logical Volume Group AC9F4D1F-2370-412F-A7E7-F96D401DF5D4
|   =========================================================
|   Name:         Macintosh HD
|   Status:       Online
|   Size:         208992047104 B (209.0 GB)
|   Free Space:   15044608 B (15.0 MB)
|   |
|   +-< Physical Volume 1E4B15E1-5FCC-4174-8B7F-975FD20C30A7
|   |   ----------------------------------------------------
|   |   Index:    0
|   |   Disk:     disk0s2
|   |   Status:   Online
|   |   Size:     208992047104 B (209.0 GB)
|   |
|   +-> Logical Volume Family 91824DA9-7F03-481F-9497-935726743978
|       ----------------------------------------------------------
|       Encryption Status:       Unlocked
|       Encryption Type:         AES-XTS
|       Conversion Status:       Complete
|       Conversion Direction:    -none-
|       Has Encrypted Extents:   Yes
|       Fully Secure:            Yes
|       Passphrase Required:     Yes
|       |
|       +-> Logical Volume FD6D8A11-7EB4-4ABF-81B8-3BF262B19B51
|           ---------------------------------------------------
|           Disk:                  disk1
|           Status:                Online
|           Size (Total):          208624680960 B (208.6 GB)
|           Conversion Progress:   -none-
|           Revertible:            Yes (unlock and decryption required)
|           LV Name:               Macintosh HD
|           Volume Name:           Macintosh HD
|           Content Hint:          Apple_HFS
|
+-- Logical Volume Group F2BB7181-B7F8-4CAC-92E2-6E3C2FB16CB9
    =========================================================
    Name:         OS X Yosemite
    Status:       Online
    Size:         40498270208 B (40.5 GB)
    Free Space:   14843904 B (14.8 MB)
    |
    +-< Physical Volume 632B2624-CC63-4E42-97FC-32225755D61F
    |   ----------------------------------------------------
    |   Index:    0
    |   Disk:     disk0s4
    |   Status:   Online
    |   Size:     40498270208 B (40.5 GB)
    |
    +-> Logical Volume Family 4A3CC433-41F4-4359-965F-9DC694BD7076
        ----------------------------------------------------------
        Encryption Status:       Unlocked
        Encryption Type:         AES-XTS
        Conversion Status:       Complete
        Conversion Direction:    -none-
        Has Encrypted Extents:   Yes
        Fully Secure:            Yes
        Passphrase Required:     Yes
        |
        +-> Logical Volume B1F66C16-978D-452C-9D9C-CB3E14C8BDFD
            ---------------------------------------------------
            Disk:                  disk2
            Status:                Online
            Size (Total):          40131100672 B (40.1 GB)
            Conversion Progress:   -none-
            Revertible:            No
            LV Name:               OS X Yosemite
            Volume Name:           OS X Yosemite
            Content Hint:          Apple_HFS

It says the logical volume is not revertible.

asriznet · Nov 28, 2014

Looks like you have Filevault switched on.

Are you planning to delete the "OS X Yosemite" partition?

Can you boot into "OS X Yosemite" and turn off filevault first? http://support.apple.com/en-sg/ht4790

Weaselboy · Nov 29, 2014

afsnyder said:
It says the logical volume is not revertible.

Assuming you want to delete the Yosemite partition, run this command either from recovery or from Mavericks. The earlier revert command I gave you won't work because you have FileVault encryption turned on for the Yosemite partition.

Code:

diskutil cs delete F2BB7181-B7F8-4CAC-92E2-6E3C2FB16CB9

afsnyder · Nov 29, 2014

asriznet said:
Looks like you have Filevault switched on.

Are you planning to delete the "OS X Yosemite" partition?

Can you boot into "OS X Yosemite" and turn off filevault first? http://support.apple.com/en-sg/ht4790

When I boot up by pressing Option... I'm no longer presented with OS X Yosemite. I see an "EFI Boot" option.

EDIT:

Weaselboy said:
Assuming you want to delete the Yosemite partition, run this command either from recovery or from Mavericks. The earlier revert command I gave you won't work because you have FileVault encryption turned on for the Yosemite partition.

Code:

diskutil cs delete F2BB7181-B7F8-4CAC-92E2-6E3C2FB16CB9

This worked perfectly! Thanks!

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