LVM appears Red in Disk Utilities - can I fix or delete?

Thanks for the reply. Have found that when I disconnect the external drive, I still see the LVG (below). My guess is that somehow because of encryption it tried to pull this LVG under the LVM as my main HD is encrypted as well? Does that make any sense?

When I created the original partition it was on an empty 2 TB external drive and I selected encrypted partition. I am fairly certain it was on the external drive/volume b/c I was adding second partition and I remember seeing the first by name.

I have since completed a TM backup and creating a recovery disk in a moment (re-downloaded Yosemite)

I am thinking my option are:

1. Boot and see if i can still boot successfully - if so do nothing as this is my main work laptop and I want to keep it running

2. Boot from recovery partition / disk and use Disk Utility to remove the LVG while the main HD is not mounted

3. Boot from recovery partition / disk and use Disk Utility 'fix' option (scared it will wipe from my main volume but theoretically I could do a TM restore)

I also through about trying to decrypt my main HD to see if Disk Utility might be able to deal with it any better but I don't think I have the ability to as my company forced the encryption policy and at no time did I enter a pw (corp network based backup/restore program is the recommended approach)

There is no local support in my company so it's really up to me at this point....

Any thoughts or suggestions appreciated.

jkuhnes2015MBP:Volumes jkuhne$ diskutil cs list

CoreStorage logical volume groups (2 found)

|

+-- Logical Volume Group 76E9E6C3-D163-4BD6-84D8-86D8ACEE3206

| =========================================================

| Name: Macintosh HD

| Status: Online

| Size: 499418034176 B (499.4 GB)

| Free Space: 0 B (0 B)

| |

| +-< Physical Volume A8EF1B21-C133-462E-ADC3-33004CE1545C

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

| | Index: 0

| | Disk: disk0s2

| | Status: Online

| | Size: 499418034176 B (499.4 GB)

| |

| +-> Logical Volume Family 03C7E36F-FB3F-47C1-A03E-2F8F04283B0E

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

| 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 EF4379C6-7CD8-4D16-90E7-5FB634EB1E8B

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

| Disk: disk1

| Status: Online

| Size (Total): 499088621568 B (499.1 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 D7982B05-9B63-4C93-A5F3-8F4DE6FD56B4

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

Name: Home - Time Machine 1TB

Status: Offline

Size: 1999909998592 B (2.0 TB)

Free Space: -none-

|

+-< Physical Volume 64BA29D9-8C4B-430C-9922-8F4EA0E843AA

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

(No properties)

one more thing attempted after doing some reading...

jkuhnes2015MBP:Volumes jkuhne$ diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage 499.4 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD *499.1 GB disk1

Logical Volume on disk0s2

EF4379C6-7CD8-4D16-90E7-5FB634EB1E8B

Unlocked Encrypted

/dev/disk2

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *8.0 GB disk2

1: EFI EFI 209.7 MB disk2s1

2: Apple_HFS Install OS X Yosemite 7.7 GB disk2s2

/dev/disk5

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Home - Time Machine... *2.0 TB disk5

Logical Volume on

1E869F3E-47EE-4E39-92EF-34A5F9F071F5

Unencrypted

$ sudo diskutil eraseDisk JHFS+ name disk5

Password:

Unable to begin erase operation: Placing a partition map on a Core Storage logical volume is not supported (-69671)

diskutil unmountDisk disk5

Unmount of all volumes on disk5 was successful

diskutil partitionDisk disk5 GPT ExFAT Files 16g

Error creating partition map: Placing a partition map on a Core Storage logical volume is not supported (-69671)

I did not see deactivate

$ diskutil cs

Usage: diskutil [quiet] coreStorage|CS <verb> <options>,

where <verb> is as follows:

list (Show status of CoreStorage volumes)

info[rmation] (Get CoreStorage information by UUID or disk)

convert (Convert a volume into a CoreStorage volume)

revert (Revert a CoreStorage volume to its native type)

create (Create a new CoreStorage logical volume group)

delete (Delete a CoreStorage logical volume group)

rename (Rename a CoreStorage logical volume group)

createVolume (Create a new CoreStorage logical volume)

deleteVolume (Delete a volume from a logical volume group)

encryptVolume (Encrypt a CoreStorage logical volume)

decryptVolume (Decrypt a CoreStorage logical volume)

unlockVolume (Attach/mount a locked CoreStorage logical volume)

changeVolumePassphrase (Change a CoreStorage logical volume's passphrase)

but tired a few and found some undocumented cmds "removeDisk" - however it did not work

http://blog.fosketts.net/2011/08/05/undocumented-corestorage-commands/

|

+-- Logical Volume Group D7982B05-9B63-4C93-A5F3-8F4DE6FD56B4

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

Name: Home - Time Machine 1TB

Status: Offline

Size: 1999909998592 B (2.0 TB)

Free Space: -none-

|

+-< Physical Volume 64BA29D9-8C4B-430C-9922-8F4EA0E843AA

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

(No properties)

$ diskutil coreStorage removeDisk 64BA29D9-8C4B-430C-9922-8F4EA0E843AA

Error removing CoreStorage Physical Volume: Not a valid CoreStorage Physical Volume UUID (-69777)

$ diskutil coreStorage delete D7982B05-9B63-4C93-A5F3-8F4DE6FD56B4

The Core Storage Logical Volume Group UUID is D7982B05-9B63-4C93-A5F3-8F4DE6FD56B4

Started CoreStorage operation

Destroying Logical Volume Group

Error: -69783: Unable to delete the CoreStorage Logical Volume Group

$ diskutil coreStorage deleteVolume D7982B05-9B63-4C93-A5F3-8F4DE6FD56B4

D7982B05-9B63-4C93-A5F3-8F4DE6FD56B4 does not appear to be a valid Core Storage Logical Volume UUID or disk

Thank you for taking the time to reply. I have to step away for a little bit but I will do more reading along the lines of what you are saying...

It was only one external drive. I added a second partition to it journaled / encrypted and then during a time machine backup where it was encrypting, I believe I clicked 'skip this backup' , turned off time machine and ejected the HD. After adding it back later, I decided I did not want an encrypted partition and attempted to delete it with disk utilities UI vs. cmd line. This is where I ran into trouble... I have since added a second partition to the same USB HD (non-encrypted) and performed a successful time machine backup. However this LVG remains without a partition under it....

Hi! Good news...

I rebooted with my Recovery USB ready, held Option/Alt, selected my main HD and now I'm back and the LVG no longer appears in disk utilities or diskutil cs list. The fact I had the volume offline I guess was enough (there was no partition -otherwise I would have excluded it in fstab). So I don't really have a solid explanation for the sequence of events but seems to have corrected itself. Thank you very much for taking the time to reply and help!

Jay

Hi! Good news...

I rebooted with my Recovery USB ready, held Option/Alt, selected my main HD and now I'm back and the LVG no longer appears in disk utilities or diskutil cs list. The fact I had the volume offline I guess was enough (there was no partition -otherwise I would have excluded it in fstab). So I don't really have a solid explanation for the sequence of events but seems to have corrected itself. Thank you very much for taking the time to reply and help!

Jay

I tried sudo. Same result ;-( Thank you Alberto for the other thread, I'm looking at it now

Sorry if replying 2x. I tried sudo, same result