? missing hard drive space

Hi All,

this may be an old issue, but have not found any suitable references.

30GB HD PBG3 running 10.3.3

partitioned into 2x15GB

the main partition is HD A (with OS); the Finder reports 12.15 used,
lists only 1.86GB available, capacity 13.97
yet OmniDiscSweeper, in an effort to ID and remove wasted space, reports
only 5.1GB used for the root /
Am I misunderstanding the root?
have run fsck -f at startup, and MacJanitor, with little change.

The second partition figures seem correct.

Am I missing aproximately half my space or mis-interpreting? A pointer
to relevant info would be appreciated


Chris Brown
Neurosurgery
University of Adelaide