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Time Machine and case sensitivity

DayCay -  
 SP -
Hello,

I would like to know if it poses a problem that my external hard drive on which I do Time Machine is in case-sensitive extended OS (journaled), knowing that my Mac's hard drive is in journaled extended OS?

Thank you

Configuration: Mac OS X / Firefox 5.0.1

3 answers

  1.
    _Ritchi_ Posted messages 21130 Registration date   Status Contributor Last intervention   6 135
     
    Hello,

    If you consult this Apple article Mac 1-2-3: Time Machine, there is no problem because Time Machine can handle this format.

    A reminder about these two formats:
    Mac OS Extended: this is the "understandable" name for HFS+ (Hierarchical File System Plus), a file management system that appeared with Mac OS 8.1 (and still valid on Mac OS X). Improvements made (among others):
    - file names are now limited to 255 characters, instead of 31 previously
    - file names are encoded in Unicode instead of Macroman: this allows for internationalization of file names
    - the maximum file size increases from 2 to the power of 31 bytes to 2 to the power of 63 (more details here)

    Journaled: this means that every write on the disk is recorded in a journal. In the event of an unexpected machine crash, the recovery of unwritten data is made easier as a result.

    Case-sensitive Mac OS Extended: This format appeared with Intel processors and Mac OS X.4. It is based on HFSX, which is based on HFS+, which in turn is based on HFS. Main improvement: with this option, files named "fred", "Fred", and "FRED" are considered as different files. With the default HFS+, these three files are the same file.

    Ritchi
    35
    1. carmnader
       
      Be careful with case-sensitive formatting, Adobe applications do not support it (and they are probably not the only ones).
      0
    2. jflo73 Posted messages 1 Status Member
       
      Thank you for these very precise and useful explanations.
      0
    3. statreal
       
      Thank you for this clear explanation.
      0
    4. SP
       
      Yes, the Mac OS Extended (Case Sensitive) format is a source of errors for many applications; unless you have a very specific need, I do not recommend it.
      0