Partition Reverts to Mac OS Extended after setting to Mac OS Extended (Journaled)

[el2493]

All of our lab computers have file type Mac OS Extended (Journaled) on the boot partition. We created 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 format 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 partitions 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 formation 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. Not sure if there are any logs or anything I can check through JSS/Jamf that might give a hint as to what's causing this (or whether JSS itself could be causing it).

[el2493]

If I run diskutil list it always 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

However if I do diskutil info disk0s4 when it's still Mac OS Extended, it shows:

Device Identifier:        disk0s4
   Device Node:              /dev/disk0s4
   Whole:                    No
   Part of Whole:            disk0

   Volume Name:              Examplify_backup
   Mounted:                  Yes
   Mount Point:              /Volumes/Examplify_backup 1

   Partition Type:           Apple_HFS
   File System Personality:  HFS+
   Type (Bundle):            hfs
   Name (User Visible):      Mac OS Extended
   Owners:                   Enabled

   OS Can Be Installed:      No
   Media Type:               Generic
   Protocol:                 SATA
   SMART Status:             Verified
   Volume UUID:              D3DCE9B4-8FCD-36BC-9D4D-FEC102C3FBFB
   Disk / Partition UUID:    5CE62858-0BD6-41B5-B7A5-A03FD0D14EA3

   Disk Size:                9.2 GB (9210912768 Bytes) (exactly 17990064 512-Byte-Units)
   Device Block Size:        512 Bytes

   Volume Total Space:       9.2 GB (9210912768 Bytes) (exactly 17990064 512-Byte-Units)
   Volume Used Space:        38.0 MB (37969920 Bytes) (exactly 74160 512-Byte-Units) (0.4%)
   Volume Available Space:   9.2 GB (9172942848 Bytes) (exactly 17915904 512-Byte-Units) (99.6%)
   Allocation Block Size:    4096 Bytes

   Read-Only Media:          No
   Read-Only Volume:         Yes

   Device Location:          Internal
   Removable Media:          Fixed

   Solid State:              No

If I run that command after erasing the partition, I get:

Device Identifier:        disk0s4
   Device Node:              /dev/disk0s4
   Whole:                    No
   Part of Whole:            disk0

   Volume Name:              Examplify_backup
   Mounted:                  Yes
   Mount Point:              /Volumes/Examplify_backup 1

   Partition Type:           Apple_HFS
   File System Personality:  Journaled HFS+
   Type (Bundle):            hfs
   Name (User Visible):      Mac OS Extended (Journaled)
   Journal:                  Journal size 8192 KB at offset 0x47000
   Owners:                   Enabled

 OS Can Be Installed:      Yes
   Media Type:               Generic
   Protocol:                 SATA
   SMART Status:             Verified
   Volume UUID:              D3DCE9B4-8FCD-36BC-9D4D-FEC102C3FBFB
   Disk / Partition UUID:    5CE62858-0BD6-41B5-B7A5-A03FD0D14EA3

   Disk Size:                9.2 GB (9210912768 Bytes) (exactly 17990064 512-Byte-Units)
   Device Block Size:        512 Bytes

   Volume Total Space:       9.2 GB (9210912768 Bytes) (exactly 17990064 512-Byte-Units)
   Volume Used Space:        37.8 MB (37818368 Bytes) (exactly 73864 512-Byte-Units) (0.4%)
   Volume Available Space:   9.2 GB (9173094400 Bytes) (exactly 17916200 512-Byte-Units) (99.6%)
   Allocation Block Size:    4096 Bytes

   Read-Only Media:          No
   Read-Only Volume:         No

   Device Location:          Internal
   Removable Media:          Fixed

   Solid State:              No

So there is a difference, I just can't figure out why it reverts.

[el2493]

In case anyone else is running into this, the issue for me was a Configuration Profile:

Restrictions>Media>Internal Disks>Read-Only

Once I unchecked that and restarted the computer, the issue was resolved