Format for HD for Time Machine?

Discussion in 'Mac Apps and Mac App Store' started by dawgfan, Feb 17, 2014.

  1. dawgfan macrumors 6502

    dawgfan

    Joined:
    Jul 30, 2009
    Location:
    Rocket City, USA
    #1
    Mid-2007 Black MacBook, new SSD installed, want to wipe old Seagate FreeAgent Go HD to use for Time Machine.

    Choices in Disk Utility for Formatting includes:

    MAC OS Extended - Journaled
    MAC OS Extended - Journaled, Encrypted
    MAC OS Extended - Case-Sensitive, Journaled
    MAC OS Extended - Case-Sensitive, Journaled, Encrypted
    MS-DOS (FAT)
    ExFAT

    Which would be best to use please?
     
  2. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #2
    First one, and then from there you can decide to have the backup within TM encrypted if you so choose.
     
  3. dawgfan thread starter macrumors 6502

    dawgfan

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    Jul 30, 2009
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    Rocket City, USA
  4. MatsSkoe macrumors member

    MatsSkoe

    Joined:
    Jul 28, 2013
    Location:
    Rotterdam
    #4
    You can divide your Seagate in two partitions depending on the space available.

    I use Time Machine for my 128 Gb MBA and my WD has the following partitions:

    - 150 Gb MAC OS Extended - Journaled, Encrypted: Time Machine
    - 170 Gb ExFAT: portable disk space for both Mac OS and (newer) Windows

    If you never use Windows the second partition can also be the standard Mac OS Extended, Journaled. Use encryption if you want but the case-sensitive option is only a advanced option which you don't need.
     
  5. dawgfan thread starter macrumors 6502

    dawgfan

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    Jul 30, 2009
    Location:
    Rocket City, USA
    #5
    Did the format in disc utilities, but it only took a few seconds. That can't be enough?
     
  6. MatsSkoe macrumors member

    MatsSkoe

    Joined:
    Jul 28, 2013
    Location:
    Rotterdam
    #6
    That is enough. It only writes the begin of the disk to say it's empty. If you want to be sure to wipe all the old data use the security options.
     
  7. dawgfan thread starter macrumors 6502

    dawgfan

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    Jul 30, 2009
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    Rocket City, USA
  8. gnasher729, Feb 17, 2014
    Last edited: Feb 17, 2014

    gnasher729 macrumors P6

    gnasher729

    Joined:
    Nov 25, 2005
    #8
    I would recommend encrypted, in case a burglar steals your hard drive. Especially if your MacBook is encrypted.

    I bought a 3TB drive for backups, connected to the backup server through USB 2.0. About 30 MB/second. Would take slightly over a day to erase :)
     
  9. Oldmanmac macrumors 6502

    Joined:
    Mar 31, 2012
    #9
    quick followup question then:

    If I decided to start encrypting from now ow, what about the previous backups?
    Will they 'go away', or will I need to erase/delete them? How?
     
  10. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #10
    The previous backups will stay there and be encrypted.

    Just go to TM prefs and click Select Disk then pick your existing backup disk and check the encryption box. It can take a long time for the initial encryption to finish.

    [​IMG]
     
  11. Alrescha macrumors 68020

    Joined:
    Jan 1, 2008
    #11
    Actually, if encryption is desired it is considerably faster to format the disk that way rather than turning it on later. By 'considerably faster', I mean seconds instead of hours.

    A.
     

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