Article ID: 8115
Reviewed: 2021-04-28

Product Version:
AhsayACB / AhsayOBM: 8.1 to 8.x
OS: All platforms

When performing a file backup on a OneDrive folder with Files On-Demand enabled, the following error message is received in the backup report:

No.	Type	Timestamp	Log
*	...	...	...
*	info	...	...
*	erro	YYYY/MM/DD hh:mm:ss	[New File] File="C:\Users\username\folder\file" Error="java.io.IOException: [ReadFile] (381) The cloud operation is not supported on a read-only volume ... ...
*	...	...	...

or

No.	Type	Timestamp	Log
*	...	...	...
*	info	...	...
*	erro	YYYY/MM/DD hh:mm:ss	[New File] File="C:\Users\username\folder\file" Error="java.io.IOException: [CreateFileW] (395) Access to cloud file is denied ... ...
*	...	...	...

Note: This issue will only affect file backup on OneDrive folder with Files On-Demand enabled

When the "Files On-Demand" is enabled for your OneDrive folder, it saves disk space by not saving the file on the computer, instead, new files created online or on another device appear as online-only files in File Explorer.

To resolve the issue, there are a few options:

• Option 1
  Disable the File On-Demand option.  Note that this will increase the disk space usage on the affected client computer.
  
  Click Here for details on how to disable the option.


• Option 2
  Unselect the OneDrive folder from the backup source of the affected backup set.
  
  Create a new Cloud File Backup set to backup the OneDrive data.
  
  



• Option 3 (not recommended)
  Patch the AhsayCBS server and AhsayOBM / ACB client software to hotfix version 8.5.0.127 or above.
  
  Click Here for instruction on how to patch the AhsayCBS.
  Click Here for instruction on how to patch the AhsayOBM / ACB.
  
  After the patch, the backup job will skip the backup of the online (on-demand) files, an informative message will be displayed to suggest that the backup of the corresponding file was skipped.

one, drive, onedrive, cloud, on, demand, ondemand