Adding a lvm-volume how?

[Roger Grosswiler]

Hi,

I have a machine, containing 2 harddisks. The main disk crashed, so i had
to reinstall the machine.

All my data is on the 2nd harddrive In VolGroup00-LogVol01, whilst i
reinstalled fc on VolGroup00-LogVol00.

I would like to mount my data again :-)

mount -t ext2 /dev/mapper/VolGroup00-LogVol01 /data -> according to the
lvm-howto on internet.

But this gives me just the following error:

mount: /dev/mapper/VolGroup00-LogVol01 is already mounted or /volume is in
use now.

neither /var/log/messages nor ./audit/audit.log nor dmesg are saying more
to me.

What did i do wrong?

Thanks for your help.
Roger