Lutz Haake | Freelance Oracle Consultant

This may happen due to a full “system reserved partition”.

Solution:

1. go to system management — disk management and assign a drive letter to the hidden partition, e.g. “Z:”

2. run chkdsk z:

In this case, it shows the drive as about 90% full, preventing the system backup to run. The log file occupies over 50MB of the drive.

3. Shrink the logfile: chkdsk z: /l:2048

4. run chkdsk again: chkdsk z:

The drive has now suffi­cient free space available — system backup will work.