deleted macintosh hd and corestorage, how i have 2 disks called "untitled"

Discussion in 'Mac Basics and Help' started by felisett, Mar 10, 2018.

  1. felisett, Mar 10, 2018
    Last edited: Mar 10, 2018

    felisett macrumors newbie

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    Mar 10, 2018
    #1
    hello. at once i apologize for my english. i didn't find any help at forums on my language, so i came here.
    well, i'm not sure how to describe my problem, but it's connected with corestorage and fusion drive.
    it all started when i deleted windows from my mac. i had missed 1tb with it and wanted to return them back. after deleting windows i've formed fusion drive. i tried all and came to the terminal's command "diskutil cs delete [disk name]". i deleted macintosh hd.
    i didn't really know what happened to my mac after this. now my mac has two disks with: 1tb (if i open partition it has 2tb. i can use only 1tb, and other 1tb is free memory, i can't combine them) and the other one got 120gb, they both called "untitled". when i click on "install OS" its offer to choose between 2 disks.
    i don't really know should i add screenshots, because it's all in russian, i can't switch language, after this manipulation my mac is grey screened.
    also, after command "diskutil cs list" in terminal it says "no corestorage logical volume groups found".
    also, i have no time machine back ups.
    i want to return all to the factory settings
    i hope that i've properly described my problem, i really need help :(
    if there's not enough information i'll try to give more!
     
  2. Weaselboy Moderator

    Weaselboy

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    #2
    Post

    Follow the steps in my older post here ^ to rebuild the Fusion drive.

    You will need to do this from Internet recovery which is accessed by holding command-option-r at startup.
     
  3. felisett thread starter macrumors newbie

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    Mar 10, 2018
    #3
    how can i find out core storage LVG UUID again? i closed terminal after this command to look at the disk utility..
    --- Post Merged, Mar 11, 2018 ---
    also my fusion drive has 1tb of memory instead of 2tb, how can i return missing memory back?
     
  4. Weaselboy Moderator

    Weaselboy

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    #4
    Run "diskutil cs list" in Terminal and you should be able to see it.

    You need to make sure you format the entire drive as shown in this post. That will get it back to one large partition.
     
  5. felisett thread starter macrumors newbie

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    Mar 10, 2018
    #5
    after command “diskutil cs createVolume....” it says “your logical volume group already has a logical volume”
    now it looks like this, fusion still has 1tb of memory. i didn’t get how to return full memory back, because i do not have macintosh hd
     

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  6. Weaselboy Moderator

    Weaselboy

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    #6
    Since you tried to make the Fusion drive once already without formatting the disk completely. You need to start over.
     
  7. felisett thread starter macrumors newbie

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    Mar 10, 2018
    #7
    okay, thanks for answering, and how can i start over? what should i do?
     
  8. Weaselboy Moderator

    Weaselboy

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    #8
    Boot to Internet recovery then in Terminal run both of these.

    diskutil cs delete "Fusion Drive"
    diskutil cs delete Untitled

    Then erase both disks by selecting the disk itself at the top of the left column and erase.

    Then follow the steps to create the Fusion drive.
     
  9. felisett thread starter macrumors newbie

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    Mar 10, 2018
    #9
    it says “Fusion Drive does not appear to be a valid Core Storage Logical Volume Group UUID or name”, the same with “Untitled”
     
  10. Weaselboy Moderator

    Weaselboy

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    #10
    Okay... that is fine.

    You still need to format the whole drive and you have not done that yet.

    You need to enable show all devices like in my screenshot, then select the drive at the top like in my second screenshot, then erase.
     

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  11. felisett thread starter macrumors newbie

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    Mar 10, 2018
    #11
    in my case the toppest disk is fusion drive. i can not click on “erase”
     
  12. Weaselboy Moderator

    Weaselboy

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    #12
    You are still missing a step. Look at my screenshot. In Disk Utility click View at the top then checkmark "show all devices". Then you will be able to select the disk like in my second screenshot.
     
  13. felisett thread starter macrumors newbie

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    Mar 10, 2018
    #13
    i did it, still have fusion on the top
     
  14. Weaselboy Moderator

    Weaselboy

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    #14
    Run each of these commands in Terminal for me and tell me what the output of each is.

    Code:
    diskutil cs list
    
    diskutil list
     
  15. felisett, Mar 11, 2018
    Last edited by a moderator: Mar 11, 2018

    felisett thread starter macrumors newbie

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    Mar 10, 2018
    #15

    Code:
    CoreStorage logical volume groups (1 found)
    
    |
    
    +-- Logical Volume Group 726AE748-4F95-45DA-A041-78842075F5CA
    
        =========================================================
    
        Name:         fusion
    
        Status:       Online
    
        Size:         1088856047616 B (1.1 TB)
    
        Free Space:   40960 B (41.0 KB)
    
        |
    
        +-< Physical Volume 17674240-CA51-4BB1-9ED6-3DECF055AC1C
    
        |   ----------------------------------------------------
    
        |   Index:    0
    
        |   Disk:     disk0s2
    
        |   Status:   Online
    
        |   Size:     120883990528 B (120.9 GB)
    
        |
    
        +-< Physical Volume A81D9942-A9E1-4ED2-B9B6-1EB97F32034F
    
        |   ----------------------------------------------------
    
        |   Index:    1
    
        |   Disk:     disk1s2
    
        |   Status:   Online
    
        |   Size:     967972057088 B (968.0 GB)
    
        |
    
        +-> Logical Volume Family 088E61CF-4C4A-42BA-A407-1CB6D77ABF3E
    
            ----------------------------------------------------------
    
            Encryption Type:         None
    
            |
    
            +-> Logical Volume 41727223-6048-4A0C-A906-461A6F083F9B
    
                ---------------------------------------------------
    
                Disk:                  disk3
    
                Status:                Online
    
                Size (Total):          1083001274368 B (1.1 TB)
    
                Revertible:            No
    
                LV Name:               Untitled
    
                Volume Name:           Untitled
    
                Content Hint:          Apple_HFS
    
                LVG Type:              Fusion, Sparse
    
    
    -bash-3.2# diskutil list
    
    /dev/disk0 (internal):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:      GUID_partition_scheme                         121.3 GB   disk0
    
       1:                        EFI EFI                     314.6 MB   disk0s1
    
       2:          Apple_CoreStorage fusion                  120.9 GB   disk0s2
    
       3:                 Apple_Boot Boot OS X               134.2 MB   disk0s3
    
    
    /dev/disk1 (internal, physical):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:      GUID_partition_scheme                        *2.0 TB     disk1
    
       1:                        EFI EFI                     209.7 MB   disk1s1
    
       2:          Apple_CoreStorage fusion                  968.0 GB   disk1s2
    
       3:                 Apple_Boot Boot OS X               134.2 MB   disk1s3
    
    
    /dev/disk2 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:      GUID_partition_scheme                        +2.1 GB     disk2
    
       1:                  Apple_HFS OS X Base System        2.0 GB     disk2s1
    
    
    /dev/disk3 (internal, virtual):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                  Apple_HFS Untitled               +1.1 TB     disk3
    
                                    Logical Volume on disk0s2, disk1s2
    
                                    41727223-6048-4A0C-A906-461A6F083F9B
    
                                    Unencrypted Fusion Drive
    
    
    /dev/disk4 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +5.2 MB     disk4
    
    
    /dev/disk5 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +524.3 KB   disk5
    
    
    /dev/disk6 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +524.3 KB   disk6
    
    
    /dev/disk7 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +524.3 KB   disk7
    
    
    /dev/disk8 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +2.1 MB     disk8
    
    
    /dev/disk9 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +524.3 KB   disk9
    
    
    /dev/disk10 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +524.3 KB   disk10
    
    
    /dev/disk11 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +12.6 MB    disk11
    
    
    /dev/disk12 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +2.1 MB     disk12
    
    
    /dev/disk13 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +1.0 MB     disk13
    
    
    /dev/disk14 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +2.1 MB     disk14
    
    
    /dev/disk15 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +524.3 KB   disk15
    
    
    /dev/disk16 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +524.3 KB   disk16
    
    
    /dev/disk17 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +1.0 MB     disk17
    
    
    /dev/disk18 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +6.3 MB     disk18
    
    
    /dev/disk19 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +6.3 MB     disk19
    
    
    /dev/disk20 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +524.3 KB   disk20
    
    
    /dev/disk21 (disk image):
    
       #:                       TYPE NAME                    SIZE       IDENTIFIER
    
       0:                            untitled               +2.1 MB     disk21
     
  16. Weaselboy Moderator

    Weaselboy

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    #16
    Okay.. run this to kill the Fusion drive.

    Code:
    diskutil cs delete fusion
     
  17. felisett thread starter macrumors newbie

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    Mar 10, 2018
    #17
    did it.
     

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  18. Weaselboy Moderator

    Weaselboy

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    #18
    There you go... now just follow the steps to make the Fusion drive.
     
  19. felisett thread starter macrumors newbie

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    Mar 10, 2018
    #19
    ok, i made the fusion drive, but still didn’t understand how to resize memory. i have 2 disks with 1tb on each, again
     
  20. Weaselboy Moderator

    Weaselboy

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    #20
    I still don't think you are properly erasing the hard drive before making the Fusion drive. I can see here where it is still only 967GB. After killing the Fusion drive you need to open Disk Util and go to the erase tab and select AppleHDD where I have marked it and erase to Mac OS Extended (Journaled).

    Somehow you are missing this step.

    0AA5975B-FBB6-4640-9C78-AB3227F609E7.jpg
     
  21. felisett thread starter macrumors newbie

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    Mar 10, 2018
    #21
    omg, you are the best, thanks so much! it worked!
     

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