df -H /Vol*/LaCie ; gpt show disk21-bash-3.2# df -H /Vol*/LaCie ; gpt show disk21
Filesystem      Size   Used  Avail Capacity iused   ifree %iused  Mounted on
/dev/disk21s2   1.0T   114G   886G    12%  435867 3379029   11%   /Volumes/LaCie
       start        size  index  contents
           0           1         PMBR
           1           1         Pri GPT header
           2          32         Pri GPT table
          34      262144      1  GPT part - E3C9E316-0B5C-4DB8-817D-F92DF00215AE
      262178        2014         
      264192  1367187500      2  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
  1367451692   586073443         
  1953525135          32         Sec GPT table
  1953525167           1         Sec GPT header
-bash-3.2#diskutil umountDisk force disk21gpt add -b 1367451692 -s 586073436 -t 48465300-0000-11AA-AA11-00306543ECAC -i 3 disk21 ; diskutil list disk21-bash-3.2# gpt add -b 1367451692 -s 586073436 -t 48465300-0000-11AA-AA11-00306543ECAC -i 3 disk21 ; diskutil list disk21
disk21s3 added
/dev/disk21 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk21
   1:         Microsoft Reserved                         134.2 MB   disk21s1
   2:       Microsoft Basic Data LaCie                   700.0 GB   disk21s2
   3:                  Apple_HFS                         300.1 GB   disk21s3
-bash-3.2#   3:                  Apple_HFS                         300.1 GB   disk21s3newfs_hfs -J -v Clone /dev/disk21s3 ; diskutil mount disk21s3 ; diskutil list disk21-bash-3.2# newfs_hfs -J -v Clone /dev/disk21s3 ; diskutil mount disk21s3 ; diskutil list disk21
Initialized /dev/rdisk21s3 as a 279 GB case-insensitive HFS Plus volume with a 24576k journal
Volume Clone on disk21s3 mounted
/dev/disk21 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk21
   1:         Microsoft Reserved                         134.2 MB   disk21s1
   2:       Microsoft Basic Data LaCie                   700.0 GB   disk21s2
   3:                  Apple_HFS Clone                   300.1 GB   disk21s3
-bash-3.2#   3:                  Apple_HFS Clone                    300.1 GB   disk21s3df -H-bash-3.2# df -H
Filesystem      Size   Used  Avail Capacity iused               ifree %iused  Mounted on
/dev/disk1s1    2.0G   1.3G   720M    64%   45181          4294922098    0%   /
devfs           212k   212k     0B   100%     718                   0  100%   /dev
/dev/disk3      5.2M   1.5M   3.8M    28%      21          4294967258    0%   /private/var/log
/dev/disk4      524k   147k   377k    29%       6          4294967273    0%   /Volumes
/dev/disk5      524k   152k   373k    29%       8          4294967271    0%   /private/var/tmp
/dev/disk6      524k   160k   365k    31%      12          4294967267    0%   /private/var/run
/dev/disk7      2.1M   143k   2.0M     7%       2          4294967277    0%   /private/tmp
/dev/disk8      524k   143k   381k    28%       2          4294967277    0%   /System/Installation
/dev/disk9      524k   307k   217k    59%      21          4294967258    0%   /private/var/db
/dev/disk10      13M   5.4M   7.2M    43%      83          4294967196    0%   /private/var/folders
/dev/disk11     4.2M   4.2M     0B   100%     229          4294967050    0%   /private/var/root/Library
/dev/disk13     2.1M   143k   2.0M     7%       2          4294967277    0%   /private/var/root/Library/Containers
/dev/disk14     524k   180k   344k    35%      11          4294967268    0%   /Library/Preferences
/dev/disk15     524k   160k   365k    31%       6          4294967273    0%   /Library/Preferences/SystemConfiguration
/dev/disk16     1.0M   180k   868k    18%       6          4294967273    0%   /Library/Keychains
/dev/disk17     6.3M   176k   6.1M     3%       2          4294967277    0%   /private/var/tmp/RecoveryTemp
/dev/disk18     6.3M   176k   6.1M     3%       2          4294967277    0%   /private/var/tmp/OSISPredicateUpdateProductTemp
/dev/disk19     524k   143k   381k    28%       2          4294967277    0%   /private/var/tmp/InstallerCookies
/dev/disk20     2.1M   143k   2.0M     7%       2          4294967277    0%   /Library/Logs/DiagnosticReports
/dev/disk2s1    251G   186G    63G    75%  837585 9223372036853938222    0%   /Volumes/SSD
/dev/disk21s2   1.0T   114G   886G    12%  435867             3379029   11%   /Volumes/LaCie
/dev/disk21s3   300G   424M   300G     1%       4          4294967275    0%   /Volumes/Clone
-bash-3.2#caffeinate -dimsu &cp -av /Volumes/SSD/* /Volumes/Clonedf -H-bash-3.2# df -H
Filesystem      Size   Used  Avail Capacity iused               ifree %iused  Mounted on
/dev/disk1s1    2.0G   1.3G   720M    64%   45181          4294922098    0%   /
devfs           212k   212k     0B   100%     718                   0  100%   /dev
/dev/disk3      5.2M   1.9M   3.4M    36%      21          4294967258    0%   /private/var/log
/dev/disk4      524k   147k   377k    29%       6          4294967273    0%   /Volumes
/dev/disk5      524k   152k   373k    29%       8          4294967271    0%   /private/var/tmp
/dev/disk6      524k   160k   365k    31%      12          4294967267    0%   /private/var/run
/dev/disk7      2.1M   143k   2.0M     7%       2          4294967277    0%   /private/tmp
/dev/disk8      524k   143k   381k    28%       2          4294967277    0%   /System/Installation
/dev/disk9      524k   307k   217k    59%      21          4294967258    0%   /private/var/db
/dev/disk10      13M   7.2M   5.4M    58%      82          4294967197    0%   /private/var/folders
/dev/disk11     4.2M   4.2M     0B   100%     317          4294966962    0%   /private/var/root/Library
/dev/disk13     2.1M   143k   2.0M     7%       2          4294967277    0%   /private/var/root/Library/Containers
/dev/disk14     524k   180k   344k    35%      11          4294967268    0%   /Library/Preferences
/dev/disk15     524k   160k   365k    31%       6          4294967273    0%   /Library/Preferences/SystemConfiguration
/dev/disk16     1.0M   180k   868k    18%       6          4294967273    0%   /Library/Keychains
/dev/disk17     6.3M   176k   6.1M     3%       2          4294967277    0%   /private/var/tmp/RecoveryTemp
/dev/disk18     6.3M   176k   6.1M     3%       2          4294967277    0%   /private/var/tmp/OSISPredicateUpdateProductTemp
/dev/disk19     524k   143k   381k    28%       2          4294967277    0%   /private/var/tmp/InstallerCookies
/dev/disk20     2.1M   143k   2.0M     7%       2          4294967277    0%   /Library/Logs/DiagnosticReports
/dev/disk2s1    251G   186G    63G    75%  837585 9223372036853938222    0%   /Volumes/SSD
/dev/disk21s2   1.0T   114G   886G    12%  435867             3379029   11%   /Volumes/LaCie
/dev/disk21s3   300G   187G   113G    63%  803776          4294163503    0%   /Volumes/Clone
-bash-3.2#diskutil list-bash-3.2# diskutil list
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *251.0 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                 Apple_APFS Container disk2         250.8 GB   disk0s2
/dev/disk1 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        +2.1 GB     disk1
   1:                  Apple_HFS OS X Base System        2.0 GB     disk1s1
/dev/disk2 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +250.8 GB   disk2
                                 Physical Store disk0s2
   1:                APFS Volume SSD                     186.2 GB   disk2s1
   2:                APFS Volume Preboot                 21.4 MB    disk2s2
   3:                APFS Volume Recovery                519.1 MB   disk2s3
   4:                APFS Volume VM                      1.1 GB     disk2s4
/dev/disk3 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +5.2 MB     disk3
/dev/disk4 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk4
/dev/disk5 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk5
/dev/disk6 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk6
/dev/disk7 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +2.1 MB     disk7
/dev/disk8 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk8
/dev/disk9 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk9
/dev/disk10 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +12.6 MB    disk10
/dev/disk11 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +4.2 MB     disk11
/dev/disk12 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +1.0 MB     disk12
/dev/disk13 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +2.1 MB     disk13
/dev/disk14 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk14
/dev/disk15 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk15
/dev/disk16 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +1.0 MB     disk16
/dev/disk17 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +6.3 MB     disk17
/dev/disk18 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +6.3 MB     disk18
/dev/disk19 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +524.3 KB   disk19
/dev/disk20 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            untitled               +2.1 MB     disk20
/dev/disk21 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk21
   1:         Microsoft Reserved                         134.2 MB   disk21s1
   2:       Microsoft Basic Data LaCie                   700.0 GB   disk21s2
   3:                  Apple_HFS Clone                   300.1 GB   disk21s3
-bash-3.2#diskutil eraseDisk apfs "Macintosh HD" gpt disk0 ; diskutil list 
	