1. log in as root
2. run this command and make note of the sdx entries
[root@localhost ~]# ls -l /dev/sd*
brw-r----- 1 root disk 8, 0 Aug 25 03:46 /dev/sda
brw-r----- 1 root disk 8, 1 Aug 25 10:46 /dev/sda1
brw-r----- 1 root disk 8, 2 Aug 25 03:46 /dev/sda2
brw-r----- 1 root disk 8, 3 Aug 25 03:46 /dev/sda3
brw-r----- 1 root disk 8, 4 Aug 25 10:46 /dev/sda4
3. Add a new virtual hard disk to your VM from VMware Workstation GUI
4. run this command and you'll see the new entry for your newly added disk
[root@localhost ~]# ls -l /dev/sd*
brw-r----- 1 root disk 8, 0 Aug 25 03:46 /dev/sda
brw-r----- 1 root disk 8, 1 Aug 25 10:46 /dev/sda1
brw-r----- 1 root disk 8, 2 Aug 25 03:46 /dev/sda2
brw-r----- 1 root disk 8, 3 Aug 25 03:46 /dev/sda3
brw-r----- 1 root disk 8, 4 Aug 25 10:46 /dev/sda4
brw-r----- 1 root disk 8, 16 Aug 25 03:46 /dev/sdb
5. check your current file system type, it is ext3 for /
[root@localhost ~]# mount |grep ^/dev
/dev/sda4 on / type ext3 (rw)
/dev/sda2 on /tmp type ext2 (rw)
/dev/sda1 on /boot type ext3 (rw)
6. Check disk size and partition table with fdisk
[root@localhost ~]# fdisk -l
Disk /dev/sda: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 65 522081 83 Linux
/dev/sda2 66 326 2096482+ 83 Linux
/dev/sda3 327 587 2096482+ 82 Linux swap / Solaris
/dev/sda4 588 2610 16249747+ 83 Linux
Disk /dev/sdb: 26.8 GB, 26843545600 bytes
255 heads, 63 sectors/track, 3263 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/sdb doesn't contain a valid partition table
7. create an ext3 file system on the whole new disk
$ mkfs -t ext3 /dev/sdb
8. make directory as mount point
$ mkdir /bld
9. edit fstab for a permanent mount
/dev/sdb /bld ext3 defaults 0 0
10. reboot your VM