10 Replies Latest reply: Jul 25, 2008 10:10 AM by baltwo
amarkitanis Level 1 Level 1 (0 points)
Can time machine be used with a hard disk formatted HFS non-journaled?

thanks

Message was edited by: amarkitanis

MacBook Pro, Mac OS X (10.5.4)
  • V.K. Level 9 Level 9 (56,130 points)
    I think you are confusing journaling and extended.

    HFS=Mac OS
    HFS+=Mac OS extended.

    you are probably asking about Mac OS extended vs. Mac OS extended journaled. is that right?

    There is no way TM will work on an HFS volume. I'm not sure about journaling. I suspect it is not necessary to journal a drive for use with TM but I'm not positive. this shouldn't be a big issue as journaling can always be enabled later.
  • baltwo Level 9 Level 9 (61,945 points)
    AFAICT, either will work. However, Finder->Help->Mac Help->search for Time Machine and determine that for yourself.
  • amarkitanis Level 1 Level 1 (0 points)
    yea im sorry, i got confused. I meant MAc os x extended and mac os x extended journaled. What's the difference betweeen a mac os x extended journaled volume as opposed to a non-journaled one?

    thanks
  • nerowolfe Level 6 Level 6 (13,070 points)
    V.K. wrote:
    I think you are confusing journaling and extended.

    HFS=Mac OS
    HFS+=Mac OS extended.

    you are probably asking about Mac OS extended vs. Mac OS extended journaled. is that right?

    There is no way TM will work on an HFS volume. I'm not sure about journaling. I suspect it is not necessary to journal a drive for use with TM but I'm not positive. this shouldn't be a big issue as journaling can always be enabled later.


    Answer:
    When I first formatted a drive partition for TM on my second machine, I purposely did NOT select Journaled, believing Journaled drives were only necessary for active systems.
    Voila! When I gave TM permission to use that partition it became Journaled.
    I suspect that the journaled attribute is simply created to match the original drive.

    Let's see if anyone has a TM drive that is NOT journaled, out of boredom and morbid curiosity
  • V.K. Level 9 Level 9 (56,130 points)
    why is it morbid? Curiosity is good
  • nerowolfe Level 6 Level 6 (13,070 points)
    V.K. wrote:
    why is it morbid? Curiosity is good

    One definition of morbid is grisly, gruesome. Perhaps I was thinking of a Bear or Dick Tracy

    The question still stands:
    Does TM automatically make the volume journaled?
  • V.K. Level 9 Level 9 (56,130 points)
    from mac help:

    -----------------------

    Using journaling to recover your information
    If journaling is turned on for a disk, Mac OS X maintains a continuous record of changes made to files on the disk. If your computer stops because of a power failure or some other issue, Mac OS X uses the journal to recover the hard disk to the last acceptable state before it stopped.

    To turn journaling on:


    In Disk Utility, select the disk or volume in the list.


    Click Enable Journaling in the toolbar.

    If you have Mac OS X version 10.4 installed on your computer and your hard disk is formatted Mac OS Extended, journaling is turned on.

    If you upgrade from Mac OS X version 10.3 and your disk is formatted Mac OS Extended, journaling may be turned on.

    If you upgrade to Mac OS X version 10.4 from a version of Mac OS X earlier than version 10.3, journaling is not turned on. Turning on journaling is recommended.

    -------------------------------


    For more detailed info see this [link|http://en.wikipedia.org/wiki/Journalingfilesystem].
    Journaling is only really necessary on the boot drive.
  • amarkitanis Level 1 Level 1 (0 points)
    Thanks for the information. The question though has not been answered, does it work with Time Machine on an external drive when originally formatted to HFS+ non-journaled?
  • amarkitanis Level 1 Level 1 (0 points)
    Further, the volume needs to be formatted with the HFS Plus file system, with journaling enabled

    That's wikipedia. link
  • baltwo Level 9 Level 9 (61,945 points)
    According to http://www.apple.com/macosx/features/timemachine.html

    *Pick a disk. Any disk.*
    +You can designate just about any HFS-plus formatted FireWire or USB drive connected to a Mac as a Time Machine backup drive. Time Machine can also back up to another Mac running Leopard with Personal File Sharing, Leopard Server, or Xsan storage devices.+

    I don't see anything about journaling.