How to extend an extended partition on the fly in sles 11?

Question

VMware

Is it possible and how to expand the disk on the fly, without rebooting:
SLES 11

parted --list
Model: VMware Virtual disk (scsi)
Disk /dev/sdc: 451GB
Sector size (logical/physical): 512B/512B Partition
table: msdos

Number Start End Size Type Filesystem Flags
1 32.3kB 129GB 129GB extended type=05
5 64.5kB 129GB 129GB logical ext3 type=83

lsblk /dev/sdc
NAME MAJ:MIN RM SIZE RO MOUNTPOINT
sdc 8:32 0 420G 0
├ ─sdc1 8:33 0 1K 0
└─sdc5 8:37 0 120G 0 /or3

fdisk -l

Disk /dev/sdc: 451.0 GB, 450971566080 bytes
255 heads, 63 sectors/track, 54827 cylinders, total 880803840 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000 Device Load

Start End Blocks Id System
/dev/sdc1 63 251658239 125829088+ 5 Extended
/dev/sdc5 126 251658239 125829057 83 Linux