Time machine backup failure. Cannot find target disk

Discussion in 'Mac Basics and Help' started by hajime, May 14, 2016.

  1. hajime macrumors 68040

    Jul 23, 2007
    Hello, I bought a Lacie 2TB drive. At first I intended to use it to back up Windows partition. So, I reformatted it as exFAT. Then, I changed my mind and wanted to use it as a TimeMachine backup drive. I went to disk utility to reformat the drive as Mac OS Extended (Journaled) format. However, TimeMachine keeps saying that it cannot find the target disk and as a result, backup failed. I reformatted to Mac OS Extended (Journaled) format again but same problem. Know how to fix this?
  2. ddmcnair macrumors member

    Apr 25, 2011
    In Disk Utility there should be the two levels for the drive. One is the for the drive and one is for the partition. Make sure the drive is formatted with OS X Extended Journaled and the scheme is GUID Partition Map.
    (The highlighted area is the drive (OS X Journaled / GUID Partition Map))
    Screen Shot 2016-05-14 at 12.23.48 PM.png

    Once the Partition is created make sure it is formatted as OS Extended Journaled.

    (The highlighted area is the partition (OSX Extended Journaled))
    Screen Shot 2016-05-14 at 12.23.09 PM.png
    If that doesn't work, you may just have a bad drive. Good Luck!
  3. hajime thread starter macrumors 68040

    Jul 23, 2007
    Thanks but unfortunately, the issue remains to be the same.

    . When I checked the disk info, I found: hajime, system, everyone and wheel are listed. There is no user account called wheel on my computer. Is my computer hacked?
  4. richard2 macrumors regular


    Oct 21, 2010
    England, United Kingdom
    Was it a user or group? OS X has a system group named "wheel".

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