diskutil list
df -H-bash-3.2# diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *750.2 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            749.3 GB   disk0s2
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *31.0 GB    disk1
   1:                        EFI EFI                     209.7 MB   disk1s1
   2:                  Apple_HFS Install OS X Mavericks  30.6 GB    disk1s2
/dev/disk2
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *5.5 GB     disk2
   1:        Apple_partition_map                         30.7 KB    disk2s1
   2:                  Apple_HFS OS X Install ESD        5.5 GB     disk2s2
/dev/disk3
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *1.3 GB     disk3
   1:        Apple_partition_map                         30.7 KB    disk3s1
   2:                  Apple_HFS OS X Base System        1.3 GB     disk3s2
/dev/disk4
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               *524.3 KB   disk4
/dev/disk5
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               *524.3 KB   disk5
/dev/disk6
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               *524.3 KB   disk6
/dev/disk7
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               *524.3 KB   disk7
/dev/disk8
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               *524.3 KB   disk8
/dev/disk9
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk9
   1:                        EFI EFI                     209.7 MB   disk9s1
   2:                  Apple_HFS Clone                   999.9 GB   disk9s2
/dev/disk10
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               *6.3 MB     disk10
/dev/disk11
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               *2.1 MB     disk11
/dev/disk12
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               *1.0 MB     disk12
/dev/disk13
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               *524.3 KB   disk13
/dev/disk14
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               *524.3 KB   disk14
/dev/disk15
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               *1.0 MB     disk15
-bash-3.2#-bash-3.2# df -H
Filesystem     Size   Used  Avail Capacity   iused    ifree %iused  Mounted on
/dev/disk4s2   1.3G   1.2G    40M    97%    302926     9836   97%   /
devfs          206k   206k     0B   100%       696        0  100%   /dev
/dev/disk5     524k   147k   377k    29%        34       92   27%   /Volumes
/dev/disk6     524k   143k   381k    28%        33       93   26%   /private/var/tmp
/dev/disk7     524k   160k   365k    31%        37       89   29%   /private/var/run
/dev/disk8     524k   147k   377k    29%        34       92   27%   /System/Installation
/dev/disk9     524k   266k   258k    51%        63       63   50%   /private/var/db
/dev/disk10    6.3M   1.7M   4.5M    28%       425     1109   28%   /private/var/folders
/dev/disk11    2.1M   229k   1.9M    11%        54      456   11%   /private/var/root/Library
/dev/disk12    1.0M   143k   905k    14%        33      221   13%   /Library/ColorSync/Profiles/Displays
/dev/disk13    524k   164k   360k    32%        38       88   30%   /Library/Preferences
/dev/disk14    524k   160k   365k    31%        37       89   29%   /Library/Preferences/SystemConfiguration
/dev/disk15    1.0M   143k   905k    14%        33      221   13%   /Library/Keychains
/dev/disk0s2   749G   705G    44G    95% 172076710 10857032   94%   /Volumes/Macintosh HD
/dev/disk2s2   1000   700G   300G    71% 170965005 73141661   70%   /Volumes/Clone
/dev/disk1s2    31G   5.5G    25G    19%   1404136  6072076   19%   /Volumes/Image Volume
/dev/disk3s2   5.5G   5.4G    61M    99%   1319629    14816   99%   /Volumes/Mac OS X Install DVD
-bash-3.2#diskutil eraseVolume jhfs+ "Macintosh HD" disk0s2Started erase on dosks02 Macintosh HD
Unmounting disk
Erasing
Initialized /dev/rdisk0s2 as a 698 GB case-insensitive HFS Plus volume with a 57344k journal
Mounting disk
Finished erase on disk0s2 Macintosh HD 
	