Verify the hard disk information in linux

hard disk information -

[root@joshi_test-VM-Linux ~]# fdisk -l
Disk /dev/sda: 11.8 GB, 11811160064 bytes
255 heads, 63 sectors/track, 1435 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 102400 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 14 1436 11427840 8e Linux LVM
Partition 2 does not end on cylinder boundary.
Disk /dev/sdb: 42.9 GB, 42949672960 bytes <== New disk can be seen
255 heads, 63 sectors/track, 5221 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 2610 20964761 83 Linux <== Currently having single partition of Linux

2. Verify the existing LV information

root@joshi_test -VM-Linux ~]# lvdisplay
— Logical volume —
LV Name /dev/datavg/applocalvol
VG Name datavg
LV UUID SFchwv-BPVy-MuVR-rA2p-MaOC-P8oq-YGPT7B
LV Write Access read/write
LV Status available
# open 1
LV Size 19.99 GB ß Only 20G seen
Current LE 5118
Segments 1
Allocation inherit
Read ahead sectors auto
– currently set to 256
Block device 253:2

The additional disk space is already visible through fdisk (20G), so we just needed to create an additional partition (/dev/sdb2) from that space: