Turn: Online resizing of LVM partitions in centos 5.5

# Mount a New GB hard disk to the server
Fdisk-l
# New mounted Hard Disk/dev/SDB found

# Create a physical volume (PV)
Pvcreate/dev/SDB

# Extend the volume group and add/dev/SDB physical volumes to the volgroup00 volume group
Vgextend volgroup00/dev/SDB

# Directly expand the/Data Partition without umount or restart
Lvextend-L + 100% free/dev/volgroup00/logvol08
Lvresize-L + 100% free/dev/volgroup00/logvol08

# Check/Data logical volume
E2fsck-F/dev/volgroup00/logvol08

# Redefinition of partition size
Resize2fs/dev/volgroup00/logvol08

# Partition size comparison before and after expansion

# Before Expansion

# After extension