diskutil listdiskutil list
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *500.1 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage Macintosh HD            499.2 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1 (internal, virtual):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Macintosh HD           +498.9 GB   disk1
                                 Logical Volume on disk0s2
                                 2960C3BC-34F0-4270-9B75-29BFF2A8922C
                                 Unencrypted
/dev/disk2 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk2
   1:                        EFI EFI                     209.7 MB   disk2s1
   2:                  Apple_HFS Clone                   999.9 GB   disk2s2
/dev/disk3 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        +252.0 MB   disk3
   1:        Apple_partition_map                         32.3 KB    disk3s1
   2:                  Apple_HFS Google Chrome           251.9 MB   disk3s2diskutil eraseVolume jhfs+ "Macintosh HD" disk1diskutil eraseVolume jhfs+ "Macintosh HD" disk1
Started erase on disk1 Macintosh HD
Unmounting disk
Erasing
Initialized /dev/rdisk1 as a 465 GB case-insensitive HFS Plus volume with a 40960k journal
Mounting disk
Finished erase on disk1 Macintosh HDcaffeinate -dimsu &diskutil listdiskutil list
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *500.1 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage Macintosh HD            499.2 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1 (internal, virtual):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Macintosh HD           +498.9 GB   disk1
                                 Logical Volume on disk0s2
                                 2960C3BC-34F0-4270-9B75-29BFF2A8922C
                                 Unencrypted
/dev/disk2 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk2
   1:                        EFI EFI                     209.7 MB   disk2s1
   2:                  Apple_HFS Clone                   999.9 GB   disk2s2bless --info /Vol*/Mac*bless --info /Vol*/Mac*
finderinfo[0]: 627358 => Blessed System Folder is /Volumes/Macintosh HD/System/Library/CoreServices
finderinfo[1]: 692131 => Blessed System File is /Volumes/Macintosh HD/System/Library/CoreServices/boot.efi
finderinfo[2]:      0 => Open-folder linked list empty
finderinfo[3]:      0 => No alternate OS blessed file/folder
finderinfo[4]:      0 => Unused field unset
finderinfo[5]: 627358 => OS X blessed folder is /Volumes/Macintosh HD/System/Library/CoreServices
64-bit VSDB volume id:  0x4A53B0B0C5577CCC 
	