logical volume creation

lvdisplay
lvcreate -n /var/www/sw -size 500g my
lvcreate -n var-www-sw --size 500g my
mkfs.ext3 /dev/my/var-www-sw
mkdir /var/www/sw
mount /dev/my/var/www/sw /var/www/sw

check /etc/fstab
add entry as follows if not exists
/dev/mapper/my-var-www-sw /var/www/sw ext3 defaults 0 2