1 2 Previous Next 22 Replies Latest reply: Nov 25, 2013 12:43 AM by ---———--- Go to original post
  • 15. Re: Big iNode file in lost+found
    smiff Level 1 Level 1 (45 points)

    xar files CAN be Excel aut-recover files. Certainly not in my case though as I don't have Excel, but I do have a 4.35Gb iNode file in my lost+found.

  • 16. Re: Big iNode file in lost+found
    hadzee Level 1 Level 1 (0 points)

    its most likely OSX installer..run it and confirm that it is. Afterwards its upto you if you want to keep it or delete it. Later works just fine and frees up a chunk of space.

  • 17. Re: Big iNode file in lost+found
    internetpseudonym Level 1 Level 1 (0 points)

    A 4.35GB iNode file is most likely the Mountain Lion installer. Mine is. I'm going to go ahead and trash it.

  • 18. Re: Big iNode file in lost+found
    al p bundy Level 1 Level 1 (0 points)

    The iNode file is what is left over after the fscheck (disk repair) does its job.  It is usually an orphaned block of data (inode) that was not properly dereferenced when a file was deleted.  Inodes in general are low level data structures, however, a file named iNode is no more low-level than any other file.  The disk repair utility finds these orphaned data chunks, dereferences them, but saves a copy in the lost+found just in case they contain important data and the used had tried to brute-force cancel an unintended delete.  If not needed, these files can be safely deleted. 


    In this case, Finder or the AppStore app had most likely crashed or had to be force quit while in the process of deleting the file after the successful OS upgrade.


    In my case my iNode file has 4172M, and is an archived volume named "Mac OS X Install ESD", containing

    the folders "Install OS X Mountain Lion.app", "Library", "Packages", "System" plus a whole bunch of hidden files.

  • 19. Re: Big iNode file in lost+found
    cello_ Level 1 Level 1 (0 points)

    Well smiff, couldn't the x in xar refer to the x in OSX? I am quite sure an OS run by an Apple device would NOT use a MS-Office file type for documentation. Sounds odd...

  • 20. Re: Big iNode file in lost+found
    al p bundy Level 1 Level 1 (0 points)

    You are right that the mystery file has nothing to do with MS Excel. 


    Click on the search icon on the OS X menu bar (the magnifying glas at the right), type "terminal" without the quotes.  Click on the application called Terminal. Once the Terminal window opens, type the following: "man xar", without the quotes, then press enter. You will be presented with the system manual for the archiver called xar.  Use the up/down arrows to scroll, or press "q" to exit. 


    Reading through that documentation it should become obvious that xar is a file archive/compression format similar to the popular ZIP.  The unknown file is the downloaded OS X upgrade packed in the xar format.




           The  XAR  project  aims to provide an easily extensible archive format.

           Important design decisions include an easily extensible  XML  table  of

           contents  (TOC) for random access to archived files, storing the TOC at

           the beginning of  the  archive  to  allow  for  efficient  handling  of

           streamed  archives,  the  ability  to handle files of arbitrarily large

           sizes, the ability to choose independent encodings for individual files

           in  the archive, the ability to store checksums for individual files in

           both compressed and uncompressed form, and the ability to query the ta-

           ble of content's rich meta-data."

  • 21. Re: Big iNode file in lost+found
    Lucas_D Level 1 Level 1 (0 points)

    I had 2 of these large files. I did control-click --> Open with --> DiskImageMounter.app, and discovered that they appeared to be the Lion and Mountain Lion install files (I now run Mavericks). I deleted both, freeing up nearly 8 gb, and all seems well so far.

  • 22. Re: Big iNode file in lost+found
    ---———--- Level 1 Level 1 (0 points)

    My iNode6689314 file is 5,29GB and created 23 of Oct this year. That aught to be when I installed Mavericks.


    On macrumors Bernuli posts that

    What you see in lost+found is the result of a filesystem check, or Disk First Aid running and finding a some things out of alignment. Not a big deal, unless you have a bazillion of those files. Then you should find out what is causing it.

    Full thread


    That seems likely in my case.

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