Using centos 6.2x86_64 /dev/sda is primary disk /dev/sdb is secondary disk. The volume group size of /dev/sda was not enough so i increased the size of volume group using vgextend command. It was working perfectly after extending it. But after reboot the changes are not working. Kindly help in this regard.
yes i mean vgextend. VG ( Volume Group in LVM )
After reboot system automatically goes to recovery prompt and pvdisply vgdisply etc commands does not work :(