Backup Manager uses the Microsoft Windows Volume Shadow Service (VSS) to create a disk image. Environment factors may contribute to issues performing or restoring from backups when the root cause suggests a system performance issue.
If a failed backup is related to system performance, the following errors will appear in the Backup logs or the system event logs:
- Backup failed: GetVHDSector Failed (MS Error Code 1450)
- 1450 Insufficient system resources exist to complete the requested service.
- Event ID 2019, 2020 and Event ID 2021 messages may be generated by the Server service.
The following symptoms may also exist
- IIS begins refusing/dropping connections (for example, Exchange Active Sync or OWA)
- Slow throughput during backup
- High CPU/Memory utilization during the backup
Use the solutions below to resolve the symptoms described above.
We recommend that you consult with Microsoft and any stakeholders to ensure all risks are properly understood and mitigated prior to making changes on your device.
To resolve the problem, review the Microsoft article that outlines causes and resolutions for the issue.
If you are currently performing VSS shadow copies on the drive, this can cause high non-paged pool memory usage by the CA D2D drivers. Diagnose this issue by entering the command
Vssadmin list shadows.
If there are a large number of shadows, remove them with the command
Vssadmin delete shadows /All
This will remove your previous shadow copies.
Additionally you should disable shadow copies on the drive.