Symptoms

Backup hangs at 0%.

In Activity details, you see this error:

Backup failed.
database or disk is full

You check the system drive of the backed up machine and see that it is completely filled up:

Solution

1. Free up space on the system drive.

2. Restart Acronis Managed Machine service: Start -> in Search, type services.msc -> locate Acronis Managed Machine Service and click Restart service.

3. Re-attempt backup.