Add partition in LVM linux

root@localhost dev]#
[root@localhost dev]# fdisk /dev/sdc
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x50f6f010.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').

Command (m for help): p

Disk /dev/sdc: 4294 MB, 4294967296 bytes
255 heads, 63 sectors/track, 522 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x50f6f010

   Device Boot      Start         End      Blocks   Id  System

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-522, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-522, default 522):
Using default value 522

Command (m for help): p

Disk /dev/sdc: 4294 MB, 4294967296 bytes
255 heads, 63 sectors/track, 522 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x50f6f010

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1         522     4192933+  83  Linux

Command (m for help): t
Selected partition 1
Hex code (type L to list codes): 8e
Changed system type of partition 1 to 8e (Linux LVM)

Command (m for help): p

Disk /dev/sdc: 4294 MB, 4294967296 bytes
255 heads, 63 sectors/track, 522 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x50f6f010

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1               1         522     4192933+  8e  Linux LVM

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@localhost dev]#
[root@localhost dev]#
[root@localhost dev]#
[root@localhost dev]# pvscan
  PV /dev/sdb1   VG oracle_lab   lvm2 [2.00 GiB / 1.61 GiB free]
  PV /dev/sda2   VG VolGroup     lvm2 [19.51 GiB / 0    free]
  Total: 2 [21.50 GiB] / in use: 2 [21.50 GiB] / in no VG: 0 [0   ]
[root@localhost dev]#
[root@localhost dev]#
[root@localhost dev]# pvcreate /dev/sdc1
  Physical volume "/dev/sdc1" successfully created
[root@localhost dev]#
[root@localhost dev]# pvscan
  PV /dev/sdb1   VG oracle_lab      lvm2 [2.00 GiB / 1.61 GiB free]
  PV /dev/sda2   VG VolGroup        lvm2 [19.51 GiB / 0    free]
  PV /dev/sdc1                      lvm2 [4.00 GiB]
  Total: 3 [25.50 GiB] / in use: 2 [21.50 GiB] / in no VG: 1 [4.00 GiB]
[root@localhost dev]#
[root@localhost dev]# vgextend oracle_lab /dev/sdc1
  Volume group "oracle_lab" successfully extended
[root@localhost dev]#
[root@localhost dev]# pvs
  PV         VG         Fmt  Attr PSize  PFree
  /dev/sda2  VolGroup   lvm2 a--  19.51g    0
  /dev/sdb1  oracle_lab lvm2 a--   2.00g 1.61g
  /dev/sdc1  oracle_lab lvm2 a--   4.00g 4.00g
[root@localhost dev]#

[root@localhost oracle_lab]#
[root@localhost oracle_lab]# lvextend /dev/oracle_lab/u01 /dev/sdc1
  Extending logical volume u01 to 4.39 GiB
  Logical volume u01 successfully resized
[root@localhost oracle_lab]#

[root@localhost oracle_lab]# resize2fs /dev/oracle_lab/u01
resize2fs 1.43-WIP (20-Jun-2013)
Filesystem at /dev/oracle_lab/u01 is mounted on /u01; on-line resizing required
old_desc_blocks = 2, new_desc_blocks = 18
The filesystem on /dev/oracle_lab/u01 is now 4599808 blocks long.

[root@localhost oracle_lab]#
[root@localhost oracle_lab]# df -h
Filesystem                    Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root   18G  3.9G   13G  24% /
tmpfs                         2.0G  112K  2.0G   1% /dev/shm
/dev/sda1                     477M   55M  397M  13% /boot
/dev/mapper/oracle_lab-u01    4.3G  3.1M  4.1G   1% /u01
[root@localhost oracle_lab]#