This message usually tells of configuration or data issues.
Here are some things to keep in mind:
- Your parity drives must be larger than your largest data drive.
- When spanning your data drives (if you are), ensure than the combined space is less or equal to the parity space.
- On Windows, verify that your OS is not putting VSS (Volume Shadow Copy Service) data or system restore data on your PPU. This is not usually obvious as that type of data is hidden.
Silent data changes
If the above checklist does not apply to your case, here is what you can try (starting with FlexRAID 2.0 Update 11):
- Elevate the Change Detection Level. The default is 0. Set it to 1 for medium or 2 for high (high will greatly increase processing time)
- Run the Update task
If the operation succeeds, this means that you have silent data changes, which is something you should take very seriously.
A silent data change means that the content of a file changed without its modification timestamp being updated.
If you set the Change Detection Level to medium (this is not necessary if you had it at high), it is recommended that you run the Validate task and take note of all the files marked as changed.
Then, touch the flagged files to update their timestamps so that they are re-processed:
- On Linux use the touch command, on Windows download http://download.openegg.org/temp/touch-for-windows.zip
- Run the Update operation again