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Problem
Backup of QNAP NAS with Firmware 4.5.1.1480 fails with Access Denied
Issue started to be seen after upgrade of the QNAP NAS Firmware to version 4.5.1.1480
This error does not prevent the directory's contents from being successfully backed up.
The Backup job fails but all the data is backed up as expected and can be restored.
Error Message
JOB LOG:
Final error: 0xe0008488 - Access is denied.
Final error category: Security Errors
Access denied to directory \.
Error reading security data stream.
SGMON:
ERROR: recieved TBE messasge: 0xE0008488 while processing backup set: '\\<StorageName>\<DirectoryName>
Solution
This problem does not prevent the directory's contents from being successfully backed up.
The Backup job fails but all the data is backed up as expected and can be restored.
This issue is resolved in the latest QNAP Firmware version 4.5.1.1540 (released on January 7th 2021).
https://www.qnap.com/en-uk/release-notes/qts/4.5.1.1540/20210107
Note:
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