Having no problem with creating disk images in APFS format. However, I am trying to format an external disk (SSD over USB) as APFS. However, each attempt results in:
Mounting APFS Volume
Error: -69842: Couldn't mount disk
The container is created, but the volume is not. I've tried the create verb as well as the createContainer and createVolume combo. In both cases, the container appears to be properly created but the volume is not.
Once the action fails, I can disconnect the drive from the machine. When I reconnect, the volume mounts as read only and a dialog box appears stating "OS X can't repar the disk "diskName" You can still open or copy files ...."
Likewise, trying to create a volume with a size smaller than the entire drive also fails with -69842
diskutil apfs createVolume disk1s2 APFS MyFunDisk 400g
Here is diskutil list after creation and the error:
/dev/disk1 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *512.1 GB disk1
1: EFI EFI 209.7 MB disk1s1
2: Apple_APFS 511.8 GB disk1s2
/dev/disk1s2s1 (external, virtual):
#: TYPE NAME SIZE IDENTIFIER
And here it is after a disconnect and reconnent of the drive.
/dev/disk1 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *512.1 GB disk1
1: EFI EFI 209.7 MB disk1s1
2: Apple_APFS 511.8 GB disk1s2
/dev/disk1s2s1 (external, virtual):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Volume MyFunDisk +400.0 GB disk1s2s1
The mount command shows it as read only:
/dev/disk1s2s1 on /Volumes/MyFunDisk (apfs, local, nodev, nosuid, read-only, journaled, noowners)
I am guessing it is just too early, but I want to see if anyone else has had success creating an APFS formated full disk