Disable btrfs/zfs tests on startup

Server
1

Looking for a way to reduce log errors. I going to use xfs to store backups. Can I disable btrfs/zfs tests each time server starts. Also, I have assigned chown -R urbackup:urbackup /mnt/data/backup but server still has permission issue. It’s same behaviour all last versions no matter which OS.

[root@almalinux ~]# systemctl status urbackupsrv
● urbackupsrv.service - UrBackup Client/Server Network Backup System
     Loaded: loaded (/usr/lib/systemd/system/urbackupsrv.service; enabled; preset: disabled)
     Active: active (running) since Fri 2026-03-27 09:24:09 EDT; 2s ago
 Invocation: 855ef66e60eb425597c9d8e27a973a94
   Main PID: 4824 (urbackupsrv)
      Tasks: 19
     Memory: 6.6M (peak: 7.3M)
        CPU: 61ms
     CGroup: /system.slice/urbackupsrv.service
             └─4824 /usr/bin/urbackupsrv run --config /etc/sysconfig/urbackup-server --no-consoletime

Mar 27 09:24:09 almalinux systemd[1]: Started urbackupsrv.service - UrBackup Client/Server Network Backup System.
Mar 27 09:24:09 almalinux urbackupsrv[4824]: ERROR: No permission to access "/mnt/data/backup/urbackup_tmp_files"
Mar 27 09:24:09 almalinux urbackupsrv[4830]: MOUNT TEST OK
Mar 27 09:24:09 almalinux urbackupsrv[4832]: Testing for btrfs...
Mar 27 09:24:09 almalinux urbackupsrv[4832]: TEST FAILED: Creating test btrfs subvolume failed
Mar 27 09:24:09 almalinux urbackupsrv[4832]: Testing for zfs...
Mar 27 09:24:09 almalinux urbackupsrv[4832]: TEST FAILED: Dataset is not set via /etc/urbackup/dataset
[root@almalinux ~]# urbackup_snapshot_helper test
Testing for btrfs...
TEST FAILED: Creating test btrfs subvolume failed
Testing for zfs...
TEST FAILED: Dataset is not set via /etc/urbackup/dataset
[root@almalinux ~]# urbackup
urbackup_mount_helper     urbackup_snapshot_helper  urbackupsrv               
[root@almalinux ~]# urbackup_mount_helper 
Not enough parameters
[root@almalinux ~]# urbackup_mount_helper test
MOUNT TEST OK
2

Is this a problem that causes problems later, or just about the false log message?

3

I didn’t detect anything significant, but sometimes I can see errors while do urbackupsrv remove-unknown related to permissions in same directory. I can reboot server and/or restart urbackupsrv.service and it can help.
In some cases, I can disconnect current backup storage and connect another to fix it.

What about BTRFS/ZFS tests?

4

Assume server can’t create subfolder clients in same path with urbackup_tmp_files.
Default permissions were 755, I have changed to 775. Assume it has been resolved.

[root@almalinux ~]# systemctl restart urbackupsrv
[root@almalinux ~]# tail /var/log/urbackup.log 
2026-03-27 09:24:09: WARNING: Shutting down (Signal 15)
2026-03-27 09:24:09: ERROR: No permission to access "/mnt/data/backup/urbackup_tmp_files"
2026-03-27 10:42:22: WARNING: Shutting down (Signal 15)
2026-03-27 10:44:43: WARNING: Shutting down (Signal 15)
2026-03-27 10:45:33: WARNING: Shutting down (Signal 15)
2026-03-27 10:45:33: ERROR: No permission to access "/media/urbackup/urbackup_tmp_files"
2026-03-27 10:46:42: WARNING: Shutting down (Signal 15)
2026-03-27 10:47:28: WARNING: Shutting down (Signal 15)
2026-03-27 10:47:53: WARNING: Shutting down (Signal 15)
2026-03-27 10:51:41: WARNING: Shutting down (Signal 15)
[root@almalinux ~]# tail /var/log/urbackup.log 
2026-03-27 09:24:09: WARNING: Shutting down (Signal 15)
2026-03-27 09:24:09: ERROR: No permission to access "/mnt/data/backup/urbackup_tmp_files"
2026-03-27 10:42:22: WARNING: Shutting down (Signal 15)
2026-03-27 10:44:43: WARNING: Shutting down (Signal 15)
2026-03-27 10:45:33: WARNING: Shutting down (Signal 15)
2026-03-27 10:45:33: ERROR: No permission to access "/media/urbackup/urbackup_tmp_files"
2026-03-27 10:46:42: WARNING: Shutting down (Signal 15)
2026-03-27 10:47:28: WARNING: Shutting down (Signal 15)
2026-03-27 10:47:53: WARNING: Shutting down (Signal 15)
2026-03-27 10:51:41: WARNING: Shutting down (Signal 15)
[root@almalinux ~]# stat -c "%A %a %n" /media/urbackup/
drwxrwxr-x 775 /media/urbackup/
[root@almalinux ~]# ls -ld /media/urbackup/
drwxrwxr-x. 4 urbackup urbackup 47 Mar 27 10:51 /media/urbackup/
[root@almalinux ~]#
5

About first part, assume need to disable urbackup_snapshot_helper test which triggering each time service starting. Any chance I can disable it? Because I want to try with XFS and don’t need BTRFS/ZFS checks.