The message, The file system is not clean, please… notifies the user to do a file system check to make sure of data integrity.

Generally, this happens when the data volume is not unmounted properly, mainly due to:

• The abnormal shutdown or force power off the NAS.
• Some services are not stopped properly during the shutdown.
• Other unexpected cases cause the data volume is not unmounted properly.

Login to the NAS via SSH.

ls /sbin/hal_app

If the NAS is a legacy model, the output is:

ls: /sbin/hal_app: No such file or directory

If the NAS is a HAL model,the output is:

/sbin/hal_app*

Navigate to Control Panel → System Settings → Storage Management → Storage Space.

• At the right panel, click on the Storage Pool to expand it.
• Select on the Data Volume and click the Manage button.
• This will popup the Data Volume Management dialog.
• Click the Actions button and select Check File System to start the file system check.

• Once completed, reboot the NAS.
• Then run the filesystem check again.

Navigate to Control Panel → System Settings → Storage Management → Volume Management.

• Click on the Check File System button to start the file system check.

• Once completed, reboot the NAS.
• Then run the filesystem check again.