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Commvault intermittent Access Denied errors accessing CIFS shares

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Category:
ontap-9
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nas
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Applies to

  • ONTAP 9
  • CIFS/SMB
  • Commvault
  • Windows and Virtual Media Agents

Issue

  • Commvault backup jobs intermittently fail with "Access Denied" errors when attempting to delete or manage files on certain CIFS shares
  • The problem is observed primarily on newly added virtual Media Agents, while direct-attached (physical) Media Agents do not experience the issue
Symptoms and Log Output:
  • Commvault job logs: (Permission denied) - Open failed.
Windows Event Viewer:
LogName: Microsoft-Windows-SmbClient/Security
EventID: 31013
Description: The signing validation failed. Error: {StillBusy} The specified I/O request packet (IRP) cannot be disposed of because the I/O operation is not complete.
ONTAP logs:
[secd:secd_rpc_authRequest_blocked_1:alert]: params: {'clientIP':'192.168.1.1','userName':'Commvault_User','domain':'Domain1','vserverName':'vserver_name'}
[secd:secd.cifsAuth.problem:error]: vserver(vserver_name) General CIFS authentication problem. Error: User authentication procedure failed CIFS SMB2 Share mapping - ClientIp=192.168.1.1

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