Logical Volume Group on main HD?

[ramparts]

I'm using a mid-2012 MBP Retina running Yosemite 10.10.3. I ran Verify Disk in Disk Utility on my Macintosh HD and found something I don't understand. Before doing the usual check it examined a "Logical Volume Group" with the funny name 3E197EA7-DF19-4313-A587-E0713CAB61DB:

Verifying volume “Macintosh HD”
Verifying storage system
Checking volume
disk0s2: Scan for Volume Headers
disk0s2: Scan for Disk Labels
Logical Volume Group 3E197EA7-DF19-4313-A587-E0713CAB61DB on 1 device
disk0s2: Scan for Metadata Volume
Logical Volume Group has a 24 MB Metadata Volume with double redundancy
Start scanning metadata for a valid checkpoint
Load and verify Segment Headers
Load and verify Checkpoint Payload
Load and verify Transaction Segment
Incorporate 0 newer non-checkpoint transactions
Load and verify Virtual Address Table
Load and verify Segment Usage Table
Load and verify Metadata Superblock
Load and verify Logical Volumes B-Trees
Logical Volume Group contains 1 Logical Volume
Load and verify 13BE1B8D-4F3E-41D2-8BBF-D74BA42B76D9
Load and verify F7C09161-E6C4-4550-A070-878CF5B6D48D
Load and verify Freespace Summary
Load and verify Block Accounting
Load and verify Live Virtual Addresses
Newest transaction commit checkpoint is valid
Load and verify Segment Cleaning
The volume 3E197EA7-DF19-4313-A587-E0713CAB61DB appears to be OK

Is this normal?

 

[Weaselboy]

Yep... totally normal. On newer portables Yosemite turns the drive into a Core Storage volume and assigns a UUID to the volumes. That UUID number is what you are seeing there.

If you run the command below in Terminal it will display the core storage volume layout with the UUIDs.

diskutil cs list

 

[ramparts]

Thanks!