Resolved So I encrypted two partitions on an external HD and now I have a question

Discussion in 'OS X Mavericks (10.9)' started by NazgulRR, May 30, 2014.

  1. NazgulRR, May 30, 2014
    Last edited: Jun 2, 2014

    NazgulRR macrumors 6502

    Joined:
    Oct 4, 2010
    #1
    Hi!

    I partitioned by new My Passport into two partitions. The first one (used for my files) I encrypted in Finder (right-click on the drive icon and click on "encrypt"), the second one (used for Time Machine) I encrypted through the Time Machine setting.

    At that point, Disk Utility starting showing the two partitions as belonging to two separate drives. Why not as one drive with two partitions (which is what it is really and the way it was before I turned on encryption for Time Machine)?

    Here's a screenshot of what I mean (also compare to to my other drive with two (un-encrypted) partitions that shows up correctly as a single drive):

    [​IMG]

    Here's what Terminal says:

    Notice how disk1s2 is the same as disk3 and disk1s4 is the same as disk3! Why do these appear twice in diskutil list?

    Code:
    diskutil list
    /dev/disk0
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:      GUID_partition_scheme                        *500.1 GB   disk0
       1:                        EFI EFI                     209.7 MB   disk0s1
       2:                  Apple_HFS Macintosh               499.2 GB   disk0s2
       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
    /dev/disk1
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:      GUID_partition_scheme                        *2.0 TB     disk1
       1:                        EFI EFI                     209.7 MB   disk1s1
       2:          Apple_CoreStorage                         1.7 TB     disk1s2
       3:                 Apple_Boot Boot OS X               134.2 MB   disk1s3
       4:          Apple_CoreStorage                         319.9 GB   disk1s4
       5:                 Apple_Boot Boot OS X               134.2 MB   disk1s5
    /dev/disk2
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:                  Apple_HFS Time Machine           *319.6 GB   disk2
    /dev/disk3
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:                  Apple_HFS External               *1.7 TB     disk3
    /dev/disk4
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:      GUID_partition_scheme                        *2.0 TB     disk4
       1:                        EFI EFI                     209.7 MB   disk4s1
       2:                  Apple_HFS External.backup         1.7 TB     disk4s2
       3:                  Apple_HFS Macintosh.backup        339.9 GB   disk4s3
    
     
  2. mfram macrumors 65816

    Joined:
    Jan 23, 2010
    Location:
    San Diego, CA USA
    #2
    The extra disks are virtual disks that represent the unencrypted data. That's normal. Remember your original partitions are now encrypted so you can't read them directly any more.
     
  3. NazgulRR thread starter macrumors 6502

    Joined:
    Oct 4, 2010
    #3
    Hi. Thanks, makes sense!

    Another question: why are there two recovery partitions (Apple_Boot Boot OS X 134.2 MB) on the drive? Is this something required either by Time Machine (if so, then why two?) or the encryption process? The other drive does not have them.
     
  4. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #4
    Have you been messing around with a homemade Fusion drive? That is usually where that boot boot 134.2 comes from. It is normal to have one of those on the second drive part of the Fusion, but not two. You may have following bad instructions for making the Fusion.

    Give this a look.
     
  5. NazgulRR thread starter macrumors 6502

    Joined:
    Oct 4, 2010
    #5
    Nope. Never ever tried Fusion in my life. This is an external drive anyway.
     
  6. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #6
    I understand, but form the labeling, it looked like you might be using that disk as a clone target is why I asked.

    I have only ever seen that 134.2 on Fusion drives, so not sure what's up there.
     
  7. NazgulRR, May 31, 2014
    Last edited: May 31, 2014

    NazgulRR thread starter macrumors 6502

    Joined:
    Oct 4, 2010
    #7
    The disk had been freshly formatted just prior to taking the screenshot/copying info from Terminal.
     
  8. NazgulRR thread starter macrumors 6502

    Joined:
    Oct 4, 2010
    #8
    Ok, I figured this out by formatting and playing around with another external hard drive.

    The extra Apple_Boot Boot OS X 134.2 MB partition gets created with every encrypted partition on the drive (i.e., # of encrypted partitions = # of Apple_Boot Boot OS X 134.2 MB partitions). I dare not remove it/them lest I lose all data on the encrypted partition(s).
     

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