1) Add hard drive in vmware console. Select any SCSE disk type.
2) From vmware itself you will know that what will its sd number. like will it be sda,sdb.. or sdz.
3) start virtual machine and do the following as root:
# fdisk /dev/sdg1
Here create a primary partition and write partition table.
now you have disk and its partition ready.
4) create a file-system on this machine.
# mke2fs /dev/sdg1
5) create a folder in “/” where you will mount this disk. For example I created /ORACLE_SOURCE.
6) mount the disk:
mount /dev/sdg1 /ORACLE_SOURCE
So now disk is ready. if needed change its ownership to oracle using:
# chown -R oracle:dba /ORACLE_SOURCE