Little help with partitions (Core Storage?)

Discussion in 'OS X Yosemite (10.10)' started by Aquamite, Aug 21, 2015.

  1. Aquamite macrumors regular

    Aquamite

    Joined:
    Oct 2, 2014
    #1
    This is how my drive partitions look like on Disk Utility.

    [​IMG]

    More info on every drive:
    http://imgur.com/89Lsw2X,y7POZQF,IQLj3nJ,v5g70N8,DHfAaCh#0

    I don't get why I have 2 different Macintosh HD partitions (one mounted and labeled as "Encrypted Logical Partition" and the other unmounted and labeled as "Core Storage Physical Volume") on my Macintosh HD 500GB SSD.

    Also I don't get why I don't have that famous orange disk for Mac OS X Base System:
    [​IMG]

    s this normal or did I do something wrong when formating my SSD Drive and installing OS X on it?

    Thanks in advance.
     
  2. Taz Mangus macrumors 68040

    Taz Mangus

    Joined:
    Mar 10, 2011
    #2
    Your partitions are configured as core storage. You can turn it off by entering the following in the terminal application:
    Code:
    diskutil cs revert /
    
     
  3. Aquamite thread starter macrumors regular

    Aquamite

    Joined:
    Oct 2, 2014
    #3
    Thanks for your answer but according to this: http://awesometoast.com/yosemite-core-storage-and-partition-woes/

    I cannot revert from Core Storage back to HFS+ if I've encrypted the disk. This is what I get when I do

    Code:
    diskutil cs list
    [​IMG]

    I'll continue reading this whole thread where they explain Yosemite partitions: http://forums.macrumors.com/threads/caution-yosemite-may-screw-up-partitions.1741742/

    However, any further help would be really appreciated. :)
     
  4. Taz Mangus macrumors 68040

    Taz Mangus

    Joined:
    Mar 10, 2011
    #4
    I missed the part where one of the partitions is encrypted. You could turn off encryption convert the partition and then turn it back on after the partition has been converted.
     
  5. Aquamite thread starter macrumors regular

    Aquamite

    Joined:
    Oct 2, 2014
    #5
    I could but, why? I mean, what would be the advantages and disadvantages of doing and not doing so?

    The thing is I don't understand the reason it shows two different Macintosh HD partitions. I've read that Core Storage is supposed to be a Logical Volumen maganer intended to be resizable however it would not allow me to resize its partition or something like that if I actually understood what I read.
     
  6. Taz Mangus macrumors 68040

    Taz Mangus

    Joined:
    Mar 10, 2011
    #6
    Core storage is the basis for the Fusion drive. Maybe I am wrong about this but I really can't see any advantage to using Core storage if you are not using a Fusion drive and you loose the ability to resize partitions.
     
  7. Aquamite thread starter macrumors regular

    Aquamite

    Joined:
    Oct 2, 2014
    #7
    This is the default configuration I got on the GUID partition scheme when I performed the clean installation of OS X Yosemite. Do you mean resizing partitions is the only disadvantage? Well, I guess as far as anyone is attempting to make partitions on the disk it'd be fine, isn't it?

    So now I wonder, what is the real difference between both configurations and why Apple sets this Core Storage configuration as default one?
     
  8. Aquamite thread starter macrumors regular

    Aquamite

    Joined:
    Oct 2, 2014
    #8
    Just found this revealing explanation:

    Quote source: http://arstechnica.com/apple/2014/10/os-x-10-10/2/
    So as Core Storage is required to encrypt the user's disk, why would I disable it as you said if I want to keep my disk encrypted?
     
  9. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #9
    I think there is a little confusion here. Core storage is required for FileVault. What you are seeing with Macintosh HD twice there is totally normal on a core storage volume and there is nothing wrong with your Mac.

    That second screenshot with the orange base system is from recovery and that is the installer partition you see mounted there. Totally normal.
     

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