Fusion Drive info

Discussion in 'iMac' started by Macintosh1984, Dec 15, 2013.

  1. Macintosh1984 macrumors regular

    Joined:
    Dec 15, 2012
    #1
    Hi!

    A 1TB Fusion Drive user can do these command from Terminal:

    - diskutil list
    - diskutil cs list

    and write the result? On diskutil cs list you can obscure UUID.

    I did some messing around with partitions and I would like to restore it as the origin.

    Thanks!
     
  2. SaSaSushi macrumors 68040

    SaSaSushi

    Joined:
    Aug 8, 2007
    Location:
    Takamatsu, Japan
    #2
    Sure, here you go.

    /dev/disk0
    #: TYPE NAME SIZE IDENTIFIER
    0: GUID_partition_scheme *121.3 GB disk0
    1: EFI EFI 209.7 MB disk0s1
    2: Apple_CoreStorage 121.0 GB disk0s2
    3: Apple_Boot Boot OS X 134.2 MB disk0s3
    /dev/disk1
    #: TYPE NAME SIZE IDENTIFIER
    0: GUID_partition_scheme *1.0 TB disk1
    1: EFI EFI 209.7 MB disk1s1
    2: Apple_CoreStorage 797.3 GB disk1s2
    3: Apple_Boot Recovery HD 650.0 MB disk1s3
    4: Microsoft Basic Data BOOTCAMP 202.0 GB disk1s4
    /dev/disk2
    #: TYPE NAME SIZE IDENTIFIER
    0: Apple_HFS Macintosh HD *909.8 GB disk2


    CoreStorage logical volume groups (1 found)
    |
    +-- Logical Volume Group **********
    =========================================================
    Name: Macintosh HD
    Status: Online
    Size: 918333972480 B (918.3 GB)
    Free Space: 16384 B (16.4 KB)
    |
    +-< Physical Volume **************
    | ----------------------------------------------------
    | Index: 0
    | Disk: disk0s2
    | Status: Online
    | Size: 120988852224 B (121.0 GB)
    |
    +-< Physical Volume ************
    | ----------------------------------------------------
    | Index: 1
    | Disk: disk1s2
    | Status: Online
    | Size: 797345120256 B (797.3 GB)
    |
    +-> Logical Volume Family ********************
    ----------------------------------------------------------
    Encryption Status: Unlocked
    Encryption Type: None
    Conversion Status: NoConversion
    Conversion Direction: -none-
    Has Encrypted Extents: No
    Fully Secure: No
    Passphrase Required: No
    |
    +-> Logical Volume ****
    ---------------------------------------------------
    Disk: disk2
    Status: Online
    Size (Total): 909826490368 B (909.8 GB)
    Conversion Progress: -none-
    Revertible: No
    LV Name: Macintosh HD
    Volume Name: Macintosh HD
    Content Hint: Apple_HFS
     
  3. Macintosh1984 thread starter macrumors regular

    Joined:
    Dec 15, 2012
    #3
    Thanks SaSaSushi!

    An other user that do not have Bootcamp partitition can post again

    - diskutil list
    - diskutil cs list

    ?
     
  4. Macintosh1984 thread starter macrumors regular

    Joined:
    Dec 15, 2012
  5. JustMartin macrumors 6502a

    Joined:
    Feb 28, 2012
    Location:
    UK
    #5
    ok - here

    /dev/disk0
    #: TYPE NAME SIZE IDENTIFIER
    0: GUID_partition_scheme *121.3 GB disk0
    1: EFI EFI 209.7 MB disk0s1
    2: Apple_CoreStorage 121.0 GB disk0s2
    3: Apple_Boot Boot OS X 134.2 MB disk0s3
    /dev/disk1
    #: TYPE NAME SIZE IDENTIFIER
    0: GUID_partition_scheme *1.0 TB disk1
    1: EFI EFI 209.7 MB disk1s1
    2: Apple_CoreStorage 999.3 GB disk1s2
    3: Apple_Boot Recovery HD 650.0 MB disk1s3
    /dev/disk2
    #: TYPE NAME SIZE IDENTIFIER
    0: Apple_HFS Macintosh HD *1.1 TB disk2

    Name: Macintosh HD
    Status: Online
    Size: 1120333979648 B (1.1 TB)
    Free Space: 114688 B (114.7 KB)
    |
    +-< Physical Volume *
    | ----------------------------------------------------
    | Index: 0
    | Disk: disk0s2
    | Status: Online
    | Size: 120988852224 B (121.0 GB)
    |
    +-< Physical Volume *
    | ----------------------------------------------------
    | Index: 1
    | Disk: disk1s2
    | Status: Online
    | Size: 999345127424 B (999.3 GB)
    |
    +-> Logical Volume Family *
    ----------------------------------------------------------
    Encryption Status: Unlocked
    Encryption Type: None
    Conversion Status: NoConversion
    Conversion Direction: -none-
    Has Encrypted Extents: No
    Fully Secure: No
    Passphrase Required: No
    |
    +-> Logical Volume *
    ---------------------------------------------------
    Disk: disk2
    Status: Online
    Size (Total): 1111826497536 B (1.1 TB)
    Conversion Progress: -none-
    Revertible: No
    LV Name: Macintosh HD
    Volume Name: Macintosh HD
    Content Hint: Apple_HFS
     
  6. Macintosh1984 thread starter macrumors regular

    Joined:
    Dec 15, 2012
    #6
    Thank you so much JustMartin!

    I ask you one last thing.

    Type in terminal

    defaults write com.apple.DiskUtility DUDebugMenuEnabled 1

    open Disk Utility, from the Debug menu and clic on "Show every partition"
    Do a screenshot on the left where there is the partition list an publish as attach on this post

    To revert as default, close Disk Utility, open Terminal and type

    defaults write com.apple.DiskUtility DUDebugMenuEnabled 0

    These terminal commands do not create problems.

    Because my iMac is crazy, restart automatically when in stop, I want to compare if my partition are damaged after upgraded to Mavericks and restored to Mountain Lion.

    Thanks, thanks, thanks!
     
  7. Macintosh1984, Dec 21, 2013
    Last edited: Dec 21, 2013

    Macintosh1984 thread starter macrumors regular

    Joined:
    Dec 15, 2012
    #7
    This is my situation

    Code:
    /dev/disk0
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:      GUID_partition_scheme                        *121.3 GB   disk0
       1:                        EFI                         209.7 MB   disk0s1
       2:          Apple_CoreStorage                         121.0 GB   disk0s2
       3:                 Apple_Boot Boot OS X               134.2 MB   disk0s3
    /dev/disk1
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:      GUID_partition_scheme                        *1.0 TB     disk1
       1:                        EFI                         209.7 MB   disk1s1
       2:          Apple_CoreStorage                         999.3 GB   disk1s2
       3:                 Apple_Boot Boot OS X               650.0 MB   disk1s3
    /dev/disk2
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:                  Apple_HFS Macintosh HD           *1.1 TB     disk2
    Code:
    CoreStorage logical volume groups (1 found)
    |
    +-- Logical Volume Group XXXXX
        =========================================================
        Name:         Internal Drive
        Status:       Online
        Size:         1120333979648 B (1.1 TB)
        Free Space:   0 B (0 B)
        |
        +-< Physical Volume XXXXX
        |   ----------------------------------------------------
        |   Index:    0
        |   Disk:     disk0s2
        |   Status:   Online
        |   Size:     120988852224 B (121.0 GB)
        |
        +-< Physical Volume XXXXX
        |   ----------------------------------------------------
        |   Index:    1
        |   Disk:     disk1s2
        |   Status:   Online
        |   Size:     999345127424 B (999.3 GB)
        |
        +-> Logical Volume Family XXXXX
            ----------------------------------------------------------
            Encryption Status:       Unlocked
            Encryption Type:         None
            Conversion Status:       NoConversion
            Conversion Direction:    -none-
            Has Encrypted Extents:   No
            Fully Secure:            No
            Passphrase Required:     No
            |
            +-> Logical Volume XXXXX
                ---------------------------------------------------
                Disk:               disk2
                Status:             Online
                Size (Total):       1111824515072 B (1.1 TB)
                Size (Converted):   -none-
                Revertible:         No
                LV Name:            Macintosh HD
                Volume Name:        Macintosh HD
                Content Hint:       Apple_HFS
    
    disk_utility.jpg

    Can someone post the same to check differences?
     
  8. Bear macrumors G3

    Joined:
    Jul 23, 2002
    Location:
    Sol III - Terra
    #8
    Your's matches what JustMartin posted except that your recovery partition isn't marked as a recovery partition. If the recovery partition works, I'd not play with it.
     
  9. marzer macrumors 65816

    marzer

    Joined:
    Nov 14, 2009
    Location:
    Colorado
    #9
    Since you seem to be restoring your drives back to the original Fusion state, I would recommend you simply run the process from scratch. Rather than reverse engineer from an existing drive status.

    Do a full backup of your OSX system. Boot into an install or recovery disk. Use disk utility to restore your SSD and HD to a single partition each. And run the process to create a Fusion disk. Then restore your system from the latest backup.
     
  10. Macintosh1984 thread starter macrumors regular

    Joined:
    Dec 15, 2012
    #10
    Well, my iMac have a "real Fusion Drive", so after some problem, and after delete my Recovery HD, I want recreate the original Apple structure.

    Using diskuti

    - diskutil cs deleteVolume
    - diskutil cs delete

    Disk Utility recreate the real structure fixing the disaster that I had done, but now
    - the name of Logical Volume Group is Internal Drive instead of Macintosh HD
    - I can boot on Recovery HD named Boot OS X, but I need to wait a few minutes that the Recovery HD is download again from Internet, so it seems that what is already present in Boot OS X, is not taken into consideration.

    So I'm findig confirmations if the structure is OK, also into Disk Utility, if the Recovery HD is called Boot OS X and if there is a method to rename Internal Drive.

    Thanks!
     
  11. marzer macrumors 65816

    marzer

    Joined:
    Nov 14, 2009
    Location:
    Colorado
    #11
    Nice to hear your fusion drive is restored to working condition. As for the name of the logical group, that is the assigned default name set by Disk Utility when it fixes (restores) your Fusion drive to the factory condition. It's simply an inert label and has no bearing to the functioning of the drive.

    If you really need to rename it, you will need to follow the DIY instructions in the link I previously attached. But as pointed out before, it will delete the underlying volumes, requiring you to restore your system again. So backup your system before proceeding.

    The Recovery HD is not a full restoral image, hence the size of only 650MB vs over 4GB for an install disk. So yes, is does rely on internet connectivity a lot. That's why I keep a USB stick handy with the latest OS X install image loaded on it for performing system reloads.
     

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