Which file format for Time Machine? Confused

Discussion in 'macOS' started by kdum8, May 24, 2011.

  1. kdum8, May 24, 2011
    Last edited: May 25, 2011

    kdum8 macrumors 6502a

    kdum8

    Joined:
    Sep 8, 2006
    Location:
    Tokyo, Japan
    #1
    I just bought a Buffalo External 2TB Hard Drive to act as the Time Machine backup for my mac. (See here: http://www.amazon.com/Buffalo-Techn...4?ie=UTF8&s=electronics&qid=1306046618&sr=8-4)

    However, I am confused as to which file format I need to format the disk under.

    I have done a search but there seems to be conflicting advice. I am running 10.6.7 so I have the ExFAT option as well.

    Do I need to choose:

    ExFAT,
    Mac OS Extended (Jounaled),
    Mac OS Extended (Case Sensitive, Jounaled) or
    Mac OS Extended?

    Also in disk utility I have the option to format two "levels" of the same drive. Which do I need to format? (See attached image, there is the 2TB Buffalo External HDD Media and the HD-LBU2 - not sure which I should format).

    Any help would be much appreciated. :confused:
     

    Attached Files:

  2. miles01110 macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
  3. Mal macrumors 603

    Mal

    Joined:
    Jan 6, 2002
    Location:
    Orlando
    #3
    Easiest approach? Open System Preferences -> Time Machine, and choose the drive as your backup drive. If it's not the correct format, it'll automatically format it for you.

    jW
     
  4. kdum8 thread starter macrumors 6502a

    kdum8

    Joined:
    Sep 8, 2006
    Location:
    Tokyo, Japan
    #4
    Thanks for your reply. What's the reason you say HD-LBU2?

    Thanks, I'll give it a try when I get home. I think the drive is currently FAT32 formatted though. Is there only one possibility that TM will suggest?
     
  5. wrldwzrd89 macrumors G5

    wrldwzrd89

    Joined:
    Jun 6, 2003
    Location:
    Solon, OH
    #5
    The partition scheme is important too - this needs to be set to GPT (GUID Partition Table) for Intel Macs, and APM (Apple Partition Map) for PowerPC Macs.
     
  6. Mal macrumors 603

    Mal

    Joined:
    Jan 6, 2002
    Location:
    Orlando
    #6
    Yes, Time Machine will simply say that it will format it correctly. It will use the Mac OS Extended (Journaled) format with a GUID partition map (or, as the poster above noted, APM for a PPC Mac), because Time Machine cannot run on any other type of volume.

    jW
     
  7. kdum8 thread starter macrumors 6502a

    kdum8

    Joined:
    Sep 8, 2006
    Location:
    Tokyo, Japan
    #7
    Great! It worked fine and is backing up as we speak. (750 GB over USB 2 though is taking a while!)

    Thanks everyone. :)
     
  8. iThinkergoiMac macrumors 68030

    Joined:
    Jan 20, 2010
    Location:
    Terra
    #8
    If the OP is formatting the drive, it doesn't matter which one the OP selects. In fact, selecting the parent entry will give more options.
     
  9. kdum8 thread starter macrumors 6502a

    kdum8

    Joined:
    Sep 8, 2006
    Location:
    Tokyo, Japan
    #9
    So I let Time Machine do the formatting for me as suggested above. It automatically chose the non-parent HD-LBU2 entry (which it renamed 'Time Machine Backups') with a Mac OS Extended (Case-sensitive, Journaled) format and GUID partition table.
     
  10. iThinkergoiMac macrumors 68030

    Joined:
    Jan 20, 2010
    Location:
    Terra
  11. BigMcGuire, Jun 7, 2018
    Last edited: Jun 7, 2018

    BigMcGuire Contributor

    BigMcGuire

    Joined:
    Jan 10, 2012
    Location:
    California
    #11
    I didn't want to create a new thread on this but... frustrating! I got a new drive and am frustrated. I did the new APFS format and ... of course timemachine can't do that format and of course I find this out AFTER spending hours transferring data to my new drive. Now... I encrypt the drive with Mac OS Extended Encrypted only to have TimeMachine tell me that sorry, I have to decrypt the drive first. $!&#... Of course after hours of copying backup data first.

    Ok FINE, I'll have Time Machine encrypt it .... Now I start the hours of copying data again. lol.

    So looks like Mac OS Extended (Journaled) is the ONLY ONE you can do for Time Machine backup drives. Then have Time Machine encrypt it and expect to spend weeks encrypting it as it encrypts all the free space bit by bit.
     

Share This Page