[linux-lvm] Cannot unmount logical volume to reduce it

[Dan White]

RHEL5.7 x86_64
I want to reduce the size of the logical volumes on a server.
The two giving me trouble are mounted on /var and /usr

I cannot unmount them to reduce them.  Even tried booting into a rescue disc.

Any suggestions ?

“Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.”
Bill Waterson (Calvin & Hobbes)