当該HDDを繫げている状態ですと,
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_APFS Container disk1 1.0 TB disk0s2
/dev/disk1 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +1.0 TB disk1
Physical Store disk0s2
1: APFS Volume Macintosh HD 815.6 GB disk1s1
2: APFS Volume Preboot 20.6 MB disk1s2
3: APFS Volume Recovery 517.8 MB disk1s3
4: APFS Volume VM 2.1 GB disk1s4
/dev/disk2 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *2.0 TB disk2
1: EFI EFI 209.7 MB disk2s1
2: Apple_CoreStorage HDS-PZNU3TV3 2.0 TB disk2s2
3: Apple_Boot Boot OS X 134.2 MB disk2s3
/dev/disk3 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: FDisk_partition_scheme *209.7 MB disk3
1: DOS_FAT_32 UTILITIES 208.7 MB disk3s1
/dev/disk4 (external, virtual):
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS HDS-PZNU3TV3 +2.0 TB disk4
Logical Volume on disk2s2
AAB47248-841C-4841-AD31-E84AC90608DC
Unlocked Encrypted
となり,外しますと,
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_APFS Container disk1 1.0 TB disk0s2
/dev/disk1 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +1.0 TB disk1
Physical Store disk0s2
1: APFS Volume Macintosh HD 815.7 GB disk1s1
2: APFS Volume Preboot 20.6 MB disk1s2
3: APFS Volume Recovery 517.8 MB disk1s3
4: APFS Volume VM 2.1 GB disk1s4
となります.