trb-test1 /home/mod6 # lsblk
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda      8:0    0 465.8G  0 disk 
|-sda1   8:1    0   300M  0 part 
|-sda2   8:2    0   512M  0 part [SWAP]
`-sda3   8:3    0   465G  0 part /
sdb      8:16   0 232.9G  0 disk 
|-sdb1   8:17   0   300M  0 part 
|-sdb2   8:18   0   512M  0 part 
`-sdb3   8:19   0 232.1G  0 part 
trb-test1 /home/mod6 # dd if=/dev/zero of=/dev/sdb