Stuffed up reinstall of Maverick prior to sale :(

Discussion in 'OS X Mavericks (10.9)' started by holoski, Nov 8, 2015.

  1. holoski macrumors newbie

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    Nov 8, 2015
    #1
    Hi Guys,



    I have sold my iMac and went to erase everything and reinstall Maverick. I think I made mistakes and lost my partitions. The problem is I don't get a hard drive to select when reinstalling Maverick from the web install. I attach a series of pics, I have lost my Macintosh HD drive, it is just called "internal drive" I can't make a partition. I boot into safe mode, or try to, but it won't boot up to allow me to select a volume or drive.



    Please advise how I can fix. It is being collected in 5 hours :(
     

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  2. Armen macrumors 604

    Armen

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    #2
    http://osxdaily.com/2014/12/14/reinstall-os-x-mac-internet-recovery/
     
  3. holoski thread starter macrumors newbie

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    Nov 8, 2015
    #3
    thanks, I had tried that, I get to the page where you select your hard drive, but I have no drive option to select. It was fine before I erased the drive, I think I just erased the boot partition or something.
     
  4. Nermal Moderator

    Nermal

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    #4
    Did you try the "Partition" tab with Internal Drive selected? None of your screenshots down it. You can ignore disk2; it's the temporary Internet Recovery drive.
     
  5. holoski thread starter macrumors newbie

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    Nov 8, 2015
    #5
    I get this screen, but am unable to do anything. Thanks tho.
     

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  6. Nermal Moderator

    Nermal

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    #6
    Open Terminal and type "diskutil list" and note the name of your main hard drive (probably /dev/disk1). Then do a "diskutil cs revert /dev/disk1". Disk Utility should now be able to manipulate it.
     
  7. holoski thread starter macrumors newbie

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    Nov 8, 2015
    #7
    it is indeed dev/disk1, in that it is the largest disk (1TB) However I tried typing in "diskutil cs revert /dev/disk1" and got the message "did not recognise corestorage verb "revert/dev/disk1" ; type diskutilcorestorage" for a list

    Am I typing it in the correct format ?
    Screens attached. Thank you again.
     

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  8. holoski, Nov 8, 2015
    Last edited by a moderator: Nov 8, 2015

    holoski thread starter macrumors newbie

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    #8
    Someone suggested this was the problem "Your partition map is incorrect, GUID is needed, not APM (Apple Partition Map)" but no suggestion on how to remedy.
     
  9. Nermal Moderator

    Nermal

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    #9
    You've left out the space between revert and /.
     
  10. holoski thread starter macrumors newbie

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    Nov 8, 2015
    #10
    thanks, I had tried various formats, inc that and got this error. /dev/disk1 is not a CoreStorage Logical Volume.
     

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  11. holoski thread starter macrumors newbie

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    Nov 8, 2015
    #11
    Thanks.

    I ran diskutil cs list and get this.

    I ran diskutil cs revert /dev/disk1 but it says it is not a CS Logical volume. My screenprint says I do have a core logical volume, but there is no disc number against it. Thank you for your patience.
     

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  12. Nermal Moderator

    Nermal

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    #12
    Oops, I should've had you do a "diskutil cs list", which I see you did in your latest screenshot. Instead of /dev/disk1, try copying the long hex string after "Logical Volume Group". I can't make it out in your screenshot but it looks like it's there.
     
  13. holoski thread starter macrumors newbie

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    Nov 8, 2015
    #13
    lol, no problem, I am grateful for your time. Alas, it says unable to find disc when I type diskutil cs revert /dev/long hex string. I tried with and without the space in the hex string and with and without /dev at the front.

    Other research I read said to partition my internal drive, but it is all blue and doesn't let me add a drive by pressing +
     
  14. Nermal Moderator

    Nermal

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    #14
    Not /dev, just "diskutil cs revert 12345678" etc.

    Edit: I should read the whole post next time...

    Edit 2: After reading a few things, it looks like I may have been leading you astray. The steps that I found are for "fixing" a single drive whereas is seems that you have a Fusion setup. I don't know what to do :(
     
  15. holoski thread starter macrumors newbie

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    Nov 8, 2015
    #15
    I am grateful for your time still Nermal, thanks for trying.
     
  16. Weaselboy Moderator

    Weaselboy

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    California
    #16
    Here is what you do...

    Go back to Internet recovery with a command-option-r boot. Now go to Terminal and enter the command below exactly like I have it including the quotes. That will kill the Fusion drive completely.

    Code:
    diskutil cs delete "Internal Drive"
    Now quit Terminal and start Disk Utility. You should get a popup like this offering to fix the Fusion drive. Tell it to fix the drive. That should get you back to a working Fusion drive where you can go ahead with the OS install.

    fusion_drive_disk_error.png
     
  17. holoski thread starter macrumors newbie

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    Nov 8, 2015
    #17
    Perfect, thank you :)
     

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