Resolved DaisyDisk reporting 60+ GB of "hidden space"

Discussion in 'Mac OS X Lion (10.7)' started by ac3320, Jan 18, 2012.

  1. ac3320, Jan 18, 2012
    Last edited: Jan 21, 2012

    macrumors regular

    ac3320

    Joined:
    Aug 20, 2011
    Location:
    CA
    #1
    How can I clear this up? I need the space!

    Any idea what it could be? If it was *just* local TM "snapshots," shouldn't DaisyDisk be able to tell that much?

    Per the DaisyDisk website I did run Disk Utility and perform a "Repair Permissions" on the boot volume, but it still shows the hidden space...

    I also turned TM off, but I suppose I didn't really expect that to do anything : /
     

    Attached Files:

  2. macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    For space issues, there are a few things you can try:
    • Begin by restarting your computer as a first step. This sometimes resolves issues.
    • For Time Machine users on Lion, space may being consumed by Time Machine local snapshots, which can be disabled.
    • Search with Finder to see if the space is being consumed by a very large file or several large files. Adjust the 50GB in the illustration to whatever size you deem appropriate.
      [​IMG]
    • Use OmniDiskSweeper, JDisk Report or GrandPerspective to see how space is being used on your drive. Some of these apps may show more detail than others, so try several.
     
  3. macrumors regular

    Joined:
    Aug 19, 2010
    #3
  4. macrumors 68030

    Joined:
    Oct 19, 2011
    Location:
    Switzerland
    #4
    DaisyDisc runs as user application, so it doesn't have access to all files. In particular local backups are stored in /.MobileBackups and are not visible to the program.

    You can compare the output of "About this Mac" -> "More Info" -> "Storage" with DaisyDiscs results. The former usually tells you how big the local backups are.
     
  5. macrumors newbie

    Joined:
    Jan 7, 2012
    #5
    Question

    So I can understand this. You have a 500 GB hard drive.

    If I am reading your picture right there is 343 GB space for Users. Is your hard drive full already? :confused:

    There is 60 Gb of space hidden. Could that be reserved for programs or system use?
     
  6. thread starter macrumors regular

    ac3320

    Joined:
    Aug 20, 2011
    Location:
    CA
    #6
    I back up all the time, so that is not the issue (I think). Also local TM backups should delete themselves as space is needed, and I do find them a particularly useful feature. Moreover, local TM backups show up as "/Mobilebackups" or something to that effect. You can see that they are shown alongside the "hidden space" nonsense. SO that makes me think it has nothing to do with TM. Could be wrong though...

    ----------

    What are you confused about? My HD is at 420 something, 60 of which is this hidden space. It is clearly not full. My post was not about whether my HD was full or not. Obviously, if it was full the HD would be at 500.

    I really don't know what it is. That's why I am asking if any of the smart people here know what it could be.

    DaisyDisk shows all the other programs and things constituting "system use," as you put it, so I am just not really sure what the "hidden space" is.

    ----------

    If you are using the standalone version, yes they are visible as "/.MobileBackups," if you run as an admin (which is only available in the standalone, not the MAS version). So I can see the local TM snapshots just fine, and can confirm that they do not constitute any of the ~60 GB of "hidden space."
     
  7. macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #7
    Did you restart your computer, as I suggested?
    Did you try the other apps, as I suggested? As I said, they don't all show the same level of detail.
    Also, have you tried the Finder search I recommended?
     
  8. thread starter macrumors regular

    ac3320

    Joined:
    Aug 20, 2011
    Location:
    CA
    #8
    Yes of course I restarted, and I haven't tried the other apps yet, but will do so in a little bit.

    The finder search wasn't really worth anything, and I expected as much, since I doubt there would be one single file ~60 GB, ya know? But I did it anyways lol
     
  9. macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #9
    As that post says, "Adjust the 50GB in the illustration to whatever size you deem appropriate." That means don't only search for 50 or 60GB. Try searching for any files over 10GB or 5GB. Also as stated, you're searching for "a very large file or several large files."

    You seem to be skimming over possible solutions, rather than trying them.
     
  10. macrumors 68030

    Joined:
    Oct 19, 2011
    Location:
    Switzerland
    #10
    Ok, I didn't know that.

    Maybe something from this long post could be useful: http://forums.macrumors.com/showthread.php?t=1302889
     
  11. IvanOhio, Jan 20, 2012
    Last edited: Jan 20, 2012

    macrumors newbie

    Joined:
    Jan 7, 2012
    #11
    Reserved for System / Program use?

    Could that 60 GB be a system reserved or program space? Some OS's and program's need a "hidden" space for it's operation. Example, Windows 7 OS takes 100 MB when you first install it. That space is used for installing and repair. You can access it but not erase it. Maybe this is what is going on.

    Just my two cents worth of technobabble to add.
     
  12. thread starter macrumors regular

    ac3320

    Joined:
    Aug 20, 2011
    Location:
    CA
    #12
    I did try smaller file searches as well, and they turned up nothing useful. The only file over 4GB on my HD is my virtual machine, and that is only 27 GB, and is accounted for in DaisyDisk.

    ----------

    Well if that was the case, everyone should be reporting massive amounts of hidden space with DaisyDisk, and that is not the case :/
     
  13. macrumors 68030

    Joined:
    Oct 19, 2011
    Location:
    Switzerland
    #13
    Have you tried any of the other tools yet?

    Otherwise, I'm sure a
    Code:
    sudo du -h -d1
    in the root directory will help you locate the missing space.
     
  14. thread starter macrumors regular

    ac3320

    Joined:
    Aug 20, 2011
    Location:
    CA
    #14
    I tried all three programs, and none of them even showed me that the ~60 GB of "hidden space" exists, so that's a bummer.
     

    Attached Files:

  15. thread starter macrumors regular

    ac3320

    Joined:
    Aug 20, 2011
    Location:
    CA
    #15
    Also downloaded WhatSize, and it was the same story as all the other programs.

    So I booted into the Recovery HD, and did a "Repair Disk" from there. I forget the exact verbiage, but it was something to the effect of "incorrect free volume blocks reported," or something like that. So after doing that and a permissions repair for good measure, rebooted into OS X and now Disk Utility, Finder, and all the other 3rd party programs are reporting the actual amount of free space. Not sure what would have caused 80+ GB (at its biggest size) to show up as "Hidden space."

    FWIW, I like DaisyDisk the best for all of that stuff, mostly because it seems to be the most esthetically pleasing, but I will probably keep WhatSize as it's a non-pretty way to check out everything.

    Thanks everyone for your help!
     
  16. macrumors newbie

    Joined:
    Dec 8, 2012
    #16
    This works perfectly

    This all happened to me and apple support call 3 times said it was app files ???.

    I got the free ONYX program, checked on hidden files, and there was a 100GIG 18 month old file.

    Deleted it ,gained 100Gigs instantly of my 256gig drive,crazy

    Omnidisc 'did not' show the 100 GIG file
     
  17. macrumors newbie

    Joined:
    Jun 26, 2012
    #17
    I am using DaisyDisk as well and I had the exact same problem. By a chance, I used the following command to disable the time machine from making temporary local snapshots (usually deleted in a week time):

    and suddenly the hidden space disappeared and everything looks fine! ( see this link for more details about the above command).

    HTH someone else.
     

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