Reformatted Mac HD but it no longer has a Logical Volume Group

Question

Hi Guys,
I've reformatted my Mac Pro's main HD, prior to doing a completely new install of Yosemite.
Having reformatted it, I noticed that in the Disk Utility, there is no longer a main hard drive at the top of the list called Macintosh HD, with a Logical Partition (below it) also called Macintosh HD.
Instead, the main hard drive is now called by it's SSD product name, which is 1 TB Apple SSD SM10... (etc). When I highlight it, the description in the bottom of the Disk Utility window is the same (1 TB Apple SSD...), whereas it used to be called Macintosh HD and its 'type' a Logical Volume Group.
I have also noticed also that drive beneath it, Macintosh HD, is not referred to in the description as a Logical Partition now, whereas originally it was. (I've been able to make the above comparisons using my MacBook, which has never been formatted since purchase.)
My questions are:
- Is there a problem in not having a Logical Volume Group, but instead just having the hard drive specs as the name?
- If this IS a problem, what is the best way to restore the drive so that I have a Logical Volume Group and a Logical Partition, both called Macintosh HD?
If anyone can help me out with a layman's understanding of why reformatting my hard drive has set things up differently to the original configuration, and what the impacts are, I'd appreciate it!
Cheers,
Mike

Answer 1

Hi there,
Thanks very much for helping out with this, much appreciated.
Here is the info that shows up when I type distil - see below.
Cheers,
Mike
Last login: Sat Mar 21 21:51:41 on console
MJP-iMac:~ MJP$ diskutil
Disk Utility Tool
Utility to manage local disks and volumes
Most options require root access to the device
Usage:  diskutil [quiet] <verb> <options>, where <verb> is as follows:
     list                  (List the partitions of a disk)
     info[rmation]         (Get information on a specific disk or partition)
     listFilesystems       (List file systems available for formatting)
     activity              (Continuous log of system-wide disk arbitration)
     u[n]mount             (Unmount a single volume)
     unmountDisk           (Unmount an entire disk (all volumes))
     eject                 (Eject a disk)
     mount                 (Mount a single volume)
     mountDisk             (Mount an entire disk (all mountable volumes))
     enableJournal         (Enable HFS+ journaling on a mounted HFS+ volume)
     disableJournal        (Disable HFS+ journaling on a mounted HFS+ volume)
     moveJournal           (Move the HFS+ journal onto another volume)
     enableOwnership       (Treat as exact User/Group IDs for a mounted volume)
     disableOwnership      (Ignore on-disk User/Group IDs for a mounted volume)
     rename[Volume]        (Rename a volume)
     verifyVolume          (Verify the file system data structures of a volume)
     repairVolume          (Repair the file system data structures of a volume)
     verifyDisk            (Verify the components of a partition map of a disk)
     repairDisk            (Repair the components of a partition map of a disk)
     verifyPermissions     (Verify the permissions of a Mac OS X volume)
     repairPermissions     (Repair the permissions of a Mac OS X volume)
     eraseDisk             (Erase an existing disk, removing all volumes)
     eraseVolume           (Erase an existing volume)
     reformat              (Erase an existing volume with same name and type)
     eraseOptical          (Erase optical media (CD/RW, DVD/RW, etc.))
     zeroDisk              (Erase a disk, writing zeros to the media)
     randomDisk            (Erase a disk, writing random data to the media)
     secureErase           (Securely erase a disk or freespace on a volume)
     partitionDisk         ((re)Partition a disk, removing all volumes)
     resizeVolume          (Resize a volume, increasing or decreasing its size)
     splitPartition        (Split an existing partition into two or more)
     mergePartitions       (Combine two or more existing partitions into one)
     appleRAID <verb>      (Perform additional verbs related to AppleRAID)
     coreStorage <verb>    (Perform additional verbs related to CoreStorage)
diskutil <verb> with no options will provide help on that verb
MJP-iMac:~ MJP$