All of our lab computers have file system type Mac OS Extended (Journaled) on the boot partition. We needed to create a separate partition for use with a specific software, so we carved off 10 GB from the boot partition and made a 2nd partition (Examplify_backup). We created the partition by booting from a USB drive and resizing the boot partition (it still had tons of space so 10 GB wasn't a big deal). When we first did this we found that the file system had been set to Mac OS Extended [no Journaled] and since this format was read-only we had to reformat it.
That worked for a while, then the volumes on all the computers started reverting back to Mac OS Extended when they rebooted. As of right now I can login to a computer as Admin, erase the partition and set the file system to Mac OS Extended (Journaled), it mounts the drive and I can write files to the drive. However as soon as it reboots, it goes back to Mac OS Extended and the drive is read-only.
Any ideas? It's kind of hard to search for help with Mac OS Extended right now without being bombarded with APFS posts.
diskutil list shows:
/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_HFS Macintosh HD 990.0 GB disk0s2 3: Apple_Boot Recovery HD 650.0 MB disk0s3 4: Apple_HFS Examplify_backup 9.2 GB disk0s4
diskutil info disk0s4 shows (among other things) either:
Name (User Visible): Mac OS Extended
Name (User Visible): Mac OS Extended (Journaled) Journal: Journal size 8192 KB at offset 0x47000