/Volumes using lots of disk space

Doing a get info on my server boot drive shows its using 53Gb of space which seemed very high to me considering what is on there
So I ran the command
sudo du -chxd 1 /
it reported that /Volumes was using 39Gb
Obviously I don't just want to remove what is in there as it is all the mounted volumes and I don't want to risk deleting data on them
how can I clear out this phantom data?

/Volumes contains entries for every mounted volume on your computer, so if you have any external hard disks, CDs, DVDs, or additional partitions they are show up in /Volumes and will therefore be included in that figure. What's more the actual boot drive itself also shows up in /Volumes. However normally this should not be an issue because the du (diskspace usage) command is clever enough to know the difference between files on one drive/volume/partition or another.
What I have seen happen however on a server providing network home directories is a crash to upset entries in the /Volumes directory. What happens is that normally you have an additional volume mounted on your server, lets say it is called Users this will therefore show up in /Volumes as /Volumes/Users this is then shared by the server and network login accounts store their home directories in this. Lets say there is then a crash on the server, because there has been a crash the normal shutdown process has not occurred and as a result the normal steps that 'unmount' this volume have not occurred. Therefore when the server is rebooted the folder /Volumes/Users still exists. What can happen then is that the auto-mount process will 'mount' the volume against a new entry called /Volumes/Users-1 even though it still shows in the Finder as just having the name Users. In fact if you connected two volumes at the same time with the same name the same thing happens.
At this point we now have two entries in /Volumes one called /Volumes/Users which is a left over from before the crash, and the new live entry which is called /Volumes/Users-1 the problem is that Open Directory is telling the users to access and store their network home directories in /Volumes/Users and that left over folder is being automatically shared by the server. Therefore when a user logs in they start automatically putting files in that leftover folder which is actually on the boot drive and no longer corresponds to the second volume.
Potentially several Gigabytes of data could end up in their incorrect entry.
You need to see what stuff in /Volumes is actually making up your disk space use. You can do this by the following command
sudo du -achx /Volumes
This should list all files/folders on the boot drive that are in /Volumes but exclude files stored on mounted drives.

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Thanks
$ sqlplus user/pass@oracle as sysdba
SQL*Plus: Release 11.1.0.6.0 - Production on Mon Nov 2 21:37:48 2009
Copyright (c) 1982, 2007, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Release 10.2.0.1.0 - 64bit Production
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SQL>
SQL> show parameter log_archive
NAME TYPE VALUE
log_archive_config string
log_archive_dest string
log_archive_dest_1 string
log_archive_dest_10 string
log_archive_dest_2 string
log_archive_dest_3 string
log_archive_dest_4 string
log_archive_dest_5 string
log_archive_dest_6 string
log_archive_dest_7 string
log_archive_dest_8 string
NAME TYPE VALUE
log_archive_dest_9 string
log_archive_dest_state_1 string enable
log_archive_dest_state_10 string enable
log_archive_dest_state_2 string enable
log_archive_dest_state_3 string enable
log_archive_dest_state_4 string enable
log_archive_dest_state_5 string enable
log_archive_dest_state_6 string enable
log_archive_dest_state_7 string enable
log_archive_dest_state_8 string enable
log_archive_dest_state_9 string enable
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log_archive_format string ARC%S_%R.%T
log_archive_local_first boolean TRUE
log_archive_max_processes integer 2
log_archive_min_succeed_dest integer 1
log_archive_start boolean FALSE
log_archive_trace integer 0
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Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 6730
Next log sequence to archive 6730
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Hello
We use xi to transfer data from the non sap partition to the production partition.
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Hi Benny,
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The first backup made by TM was on 08 December.
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I have 120GB of data on my disks, however TM is set up to not back up any OS files, and to also exclude the Applications folder, the VMWare virtual disks, and all Cache files.
If I was to guess, I'd say TM is right now making a full backup of all the files, completely regardless of what it apparently has backed in its entirety up _several times_ before.
If that's true and the best Apple and their TimeMachine can come up with, then I'm sorry but I'll have to conclude that TimeMachine is utterly worthless -- unless one never ever has an unexpected system restart (in Leopard?! Keep dreaming...) or untold terabytes of disk space.
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Trilo

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After installing Lion TM will then backup all the new system files which can amount to about 6-8 GBs.

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Hi
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It also appears to be keeping large Setup files as well as the Applications.
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