The typical symptoms for 100% disk usage are as under :

• When you open a website, it may throw errors like no space is left on the drive or show some error page
• You may get MySQL issues
• Other unexpected or unusual errors

The most likely causes of 100% disk usage are :

• Genuine website and database usage
• Large log files, typically PHP error logs. This from our experience is a very common factor
• N99panel usage - the disk usage to make the N99panel run the way it should run
• Operating system disk usage

The system disk may not be technically 100% full, but at a certain threshold, the underlying file-system starts reporting 100% usage in order to keep the system running.

In order to find the cause of 100% usage, from within N99panel, you can typically refer to the 'Stats & More…' → 'Disk Stats'. But the problem is that even the N99panel web interface may not work when system reaches 100% disk usage. Therefore below we advise a solution which can still help you resolve 100%