Virtual Export Fails with 'Failed to set the end of the file to 0x20000 - There is not enough space on the disk' (4038768)

Virtual Exports fail near the end of the job with error, 'Failed to set the end of the file to 0x20000 - There is not enough space on the disk.' The error is misleading as it is assumed the error refers to the disk or datastore, the Agent is being exported too. The error is actually referring to free space on one of the exported volumes. The exported volume usually affected is the System Reserve Partition (SRP) as they are between 100-350 MB in size, but any volume that does not have 5-10 MB free space can trigger the failure.

Stack Trace Example:

The export has failed

One or more dependent export tasks have failed.:

* Win32 Api Failed Exception: Failed to set the end of the file to 0x20000 - There is not enough space on the disk

System.AggregateException: One or more errors occurred. ---> Replay.Core.Contracts.Export.ExportException: One or more dependent export tasks have failed. ---> System.AggregateException: One or more errors occurred. ---> System.AggregateException: One or more errors occurred. ---> Replay.Common.Contracts.Win32Api.Win32ApiFailedException: Failed to set the end of the file to 0x20000 - There is not enough space on the disk

As part of the post process for an Agent being exported, the core make updates to the change log file located in the System Volume Information folder of every volume that is exported.

The changes require 5 - 10 MB of free space to update. If the volume does not have the amount of free space needed, the exported volumes are not finalized, and the job fails.

1. On the Agent, open Disk Management (diskmgmt.msc), and identify which volume does not have 5 - 10 MB of free space
2. Stop the Agent service
3. Free space as needed in order for the volume to have the free space required for the export's post process update. If change logs are the issue, use AssureMC to delete them per KB How to Manually Delete AALogs. This will isolate a base image to one volume vs all volumes.
4. Once free space is reclaimed, start the Agent service, take a snapshot, and run a new export