ClearCase Support: How to Check ClearCase VOB Size
The command to query the size of a VOB is this:
cleartool space VOB_NAME
If you want to capture the disk space for all VOBs, use this command:
cleartool space -avobs
I recommend that you save the output of this command to a file, since the output will be very large if you have a lot of VOBs.
by Phil for Humanity