Previous 1 2 3 Next 119 Replies Latest reply: Sep 27, 2012 3:44 PM by Macnetmedia
Property Level 1 (0 points)

With a G-Drive Slim I get this message when trying to set up the disk for use with Time Machine and disk encryption. I tried Erasing the disk and it did not help. Time Machine seems to want a different partition layout on the drive. I notice people are having the same problem with other drives.

MacBook Pro, Mac OS X (10.7)
  • demasiado Level 1 (0 points)

    Same Problem with G-Drive 750GB USB.  Thought it was because I had formatted the drive with several partitions so I went back and tried to format drive via disk utility as [MacOS extended, journaled, encyrpted] with a single partition but shortly into the process it failed with the same message.  Seems I cannot encrypt this drive either via Time Machine or Disk Utility.  Currently using SuperDuper to create a bootable clone of my filevault2 encypted internal drive as my backup...

  • Pondini Level 8 (38,740 points)

    The drive must have the GUID Partition Map scheme.


    Click the top line of it in Disk Utility, like this:


    Screen shot 2011-07-29 at 1.31.40 PM.png

  • Property Level 1 (0 points)

    My drive's Partition Map Scheme is already GUID Partition Table, but still I get the error message above.

  • Pondini Level 8 (38,740 points)

    See if you can repair the Partition Map.  With the top line of the drive selected, click Repair Disk.

  • Property Level 1 (0 points)

    I tried that, and even did an Erase at the top level, but no improvement. This must be a Lion bug. I  reported it to Apple. I wonder if anyone is having trouble with other brands?

  • Pondini Level 8 (38,740 points)

    This is the first post like this I've seen.


    Was the disk already formatted, or did you format it on Lion? 


    Sounds like you'll have to reformat it.

  • Property Level 1 (0 points)

    The disk came formatted, but when it didn't work I reformatted it on Lion (as above). Did that at the top level, so that I have "Hitachi 500GB ..." at the top and then "G-DRIVE Mini" at the level below, exactly as the disk came out of the box. Everything Mac OS Extended (Journaled) with the GUID map. The Time Machine process is happy to run as long as Encryption is not selected (I just tested that), but Time Machine seems unable to encrypt the disk. Can't think of anything else to do, besides returning it and waiting for 10.7.1.

  • Pondini Level 8 (38,740 points)

    Very strange. 


    It seems unlikely it's something to do with the disk itself, but you've tried everything else.  See what the maker has to say.

  • rharder Level 1 (10 points)

    I also cannot encrypt a brand new drive. This is a Seagate GoFlex Free Agent connected by firewire.


    It's formatted GUID. I tried all kinds of combintations, including partitioning as Apple Partition Map and then back again. No luck. No encryption.




  • rharder Level 1 (10 points)

    Here's more information. I tried making the conversion at the command line. No luck.


    rob@MBP2:~ $ diskutil list


       #:                       TYPE NAME                    SIZE       IDENTIFIER


       0:      GUID_partition_scheme                        *500.1 GB   disk0

       1:                        EFI                         209.7 MB   disk0s1

       2:          Apple_CoreStorage                         499.2 GB   disk0s2

       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3


       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                  Apple_HFS Macintosh HD           *498.9 GB   disk1


       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *3.0 TB     disk4

       1:                        EFI                         209.7 MB   disk4s1

       2:                  Apple_HFS TimeMachine3TB          3.0 TB     disk4s2

    rob@MBP2:~ $ diskutil cs convert /Volumes/TimeMachine3TB

    Started CoreStorage operation on disk4s2 TimeMachine3TB

    Resizing disk to fit Core Storage headers

    Creating Core Storage Logical Volume Group

    Attempting to unmount disk4s2

    Switching disk4s2 to Core Storage

    A problem occurred; undoing all changes

    Undoing creation of Logical Volume Group

    Reclaiming space formerly used by Core Storage metadata

    Error: -69730: Unable to create boot loader partition due to the specifics of your partition map layout

    rob@MBP2:~ $


  • blank22763 Level 1 (0 points)

    Same situation here (G-Drive slim) - this is really a weird bug. Older G-Drive from my other MacBook encrypts without any problem. I also tried all of the above, including "manual" manipulation with fdisk & disktutil.



  • jhmcaleely Level 1 (0 points)

    I can report exactly the same problem (Lion, G-drive mini 500GB).


    In my case, when I try to 'verify' the disk, I get the same problems as reported in this thread:



    It seems clear to me (given that multiple users with different HDs are reporting related problems) that there is a bug in Lion somewhere.

  • clyde.frog Level 1 (0 points)

    Same problem with the WD Elements 3TB

  • Elliot Jordan Level 3 (575 points)

    I'm also having this problem.


    Western Digital 3TB MyBook, iMac 21.5in Late 2009 3.06GHz Core 2 Duo running the retail copy of 10.7.


    I agree, sounds like a Lion bug. I'm willing to wait for 10.7.x to fix it.

Previous 1 2 3 Next