Switch back to HFS+ from APFS
Recently I heard about new apple file system. Of course I wanted to try it. So I moved all files to one external hard drive for safety... And accidentaly switched it to APFS... How to revert changes?
$ diskutil apfs createContainer /dev/disk1s2
Started APFS operation on disk1s2 Data
Creating a new empty APFS Container
Unmounting Volumes
Switching disk1s2 to APFS
Creating APFS Container
Created new APFS Container disk1s2
Finished APFS operation on disk1s2 Data
$ diskutil list
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *240.1 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh SSD 239.2 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
/dev/disk1 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk1
1: EFI EFI 209.7 MB disk1s1
2: Apple_APFS 999.9 GB disk1s2
/dev/disk2 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk2
1: EFI EFI 209.7 MB disk2s1
2: Apple_HFS Untitled 499.8 GB disk2s2
/dev/disk3 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: Apple_partition_scheme +25.2 MB disk3
1: Apple_partition_map 32.3 KB disk3s1
2: Apple_HFS Data Rescue 25.1 MB disk3s2
Solution 1:
I'm afraid there's no non-destructive way to revert back to HFS once converted. You may use diskutil apfs deleteContainer /dev/disk(x)s(x) (where x is your correct APFS container). This will revert the APFS container back to HFS but will destroy all data. Best find another pool of storage to copy all data from that drive to, then revert, then copy back.
Solution 2:
You can use diskutil afs deleteContainer
to "Delete an APFS Container and reformat old disks to HFS"