Mysterious lack of free disk space

Recently im having a problem with my free disk space disappearing in osx.
running a du command shows a 90GB file usage in my /Library directory, but i cant seem to find or access it anywhere
i enabled hidden files
also ran
sudo tmutil disablelocal
my free space disappears. nothing shows up in finder or other file manager programs.
server:Library peffy03$ sudo du -h -d1
Password:
2.6G          ./Application Support
361M          ./Audio
34M          ./Automator
12M          ./Caches
0B          ./ColorPickers
100K          ./ColorSync
0B          ./Components
0B          ./Compositions
0B          ./Contextual Menu Items
1.1M          ./CoreMediaIO
99M          ./Desktop Pictures
415M          ./Dictionaries
0B          ./DirectoryServices
30M          ./Documentation
0B          ./Extensions
0B          ./Filesystems
1007M          ./Fonts
3.7M          ./Fonts Disabled
65M          ./Frameworks
0B          ./Graphics
18M          ./Image Capture
0B          ./Input Methods
254M          ./Internet Plug-Ins
28K          ./iTunes
0B          ./Java
0B          ./Keyboard Layouts
164K          ./Keychains
20K          ./LaunchAgents
28K          ./LaunchDaemons
188M          ./Logs
5.2M          ./Messages
56K          ./Modem Scripts
0B          ./OpenDirectory
8.0K          ./PDF Services
564K          ./Perl
17M          ./PreferencePanes
384K          ./Preferences
647M          ./Printers
176K          ./PrivilegedHelperTools
0B          ./Python
18M          ./QuickLook
5.2M          ./QuickTime
84K          ./Receipts
0B          ./Ruby
0B          ./Sandbox
140M          ./Screen Savers
0B          ./ScriptingAdditions
1.1M          ./Scripts
4.0K          ./Security
84G          ./Server
0B          ./Speech
0B          ./Spelling
4.1M          ./Spotlight
0B          ./StartupItems
0B          ./SystemProfiler
76K          ./Updates
21M          ./User Pictures
0B          ./Video
4.3M          ./WebServer
45M          ./Widgets
90G          .

30 seconds later
97228896          .
91052984          ./Server
57021568          ./Server/PostgreSQL For Server Services
38736148          ./Server/PostgreSQL For Server Services/Backup
33686588          ./Server/ProfileManager
33686580          ./Server/ProfileManager/Data
29436852          ./Server/ProfileManager/Data/backup
18285404          ./Server/PostgreSQL For Server Services/Data
18235408          ./Server/PostgreSQL For Server Services/Data/pg_xlog
4249724          ./Server/ProfileManager/Data/PostgreSQL
4210716          ./Server/ProfileManager/Data/PostgreSQL/pg_xlog
2696628          ./Application Support
1441632          ./Application Support/GarageBand
1031416          ./Fonts
662968          ./Printers

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Not Enough Free Disk Space on System Volume

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Welcome to the forums.
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Hi,
I'm wondering if you might be able to help me - I'm so confused with this issue.
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CarbonCopyClone. It is "donateware" ... pay if you want to. Others use SuperDuper! (both a free and a paid version). I prefer CCC, but do not let that stop you from paying for SuperDuper if others convince you as both are very competent.
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2.8GHz i7
12GB RAM
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Couple of screengrabs to illustrate:

From the menu bar, select
 ▹ System Preferences ▹ Time Machine
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i am in process of writing a shell script to backup our data.
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tuscan wrote:
do i get your answer right:
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See if this helps elucidate:
The Storage Display

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The SELECT part of the query will govern what fields you are shown, so perhaps try:
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http://onesearch.sun.com/search/onesearch/index.jsp?qt=free+disk+space&subCat=siteforumid%3Ajava31&site=dev&dftab=siteforumid%3Ajava31&chooseCat=javaall&col=developer-forums

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buy an external HD 1TB for $60
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Log Name:      Operations Manager
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How Can I Get the Amount of Free Disk Space using windows 7 please share example using GetDiskSpace i have already studied http://digital.ni.com/public.nsf/allkb/9958B8E473C4EF1786256BBC0053B64F

Reading your question a bit more in detail, I doubt whether you are using Win32 API GetDiskFreeSpace function (for which my previous post is the solution) of Programmer's Toolbox GetDiskSpace function.
With reference to the second one, it works even with disks larger than 2GB but you need to use the proper formatting code to display the returned value. I updated my example to show total free space in the debug output window and added a comparison with 3GB value using UInt64TypeCompareUInt from the Programmer's Toolbox.

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I don't seem retain disk space even after clearing the User and System caches, repairing permissions, and restarting my computer.
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5/13/10 9:49:13 AM osascript[3781] Error loading /Library/ScriptingAdditions/Adobe Unit Types.osax/Contents/MacOS/Adobe Unit Types: dlopen(/Library/ScriptingAdditions/Adobe Unit Types.osax/Contents/MacOS/Adobe Unit Types, 262): no suitable image found. Did find:
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GrowlHelperApp
AdobeResourceSynchronizer
textexpanderd
iTunesHelper
Rogue Amoeba Schedule Helper
VMware Fusion Helper
Dropbox
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Kind is Any
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