VSS backup fails with 'reached the maximum number of shadow copy operations per vserver'
Applies to
- SnapManager for Hyper-V (SMHV) 2.1.4
- ONTAP 9
- Volume Shadow Copy Service (VSS)
- CIFS shadowcopy (SMB3)
- Microsoft Hyper-V
- EMC Networker
Issue
- SMHV backups fail for any VM that resides on any SMB3 share of a specific SVM.
- Moving VMs to other shares on the same SVM has the same error.
- SnapMgrServiceHostDbg.log shows the below errors:
03/25 14:28:05.133: ProcessID= 2680 ThreadID= 24 AddToSnapshotSet failed. Error 0x8004230f
03/25 14:28:05.165: ProcessID= 2680 ThreadID= 24 Aborted backup.
03/25 14:28:05.170: ProcessID= 2680 ThreadID= 24 FormatMessage failed for code 0x8004230f with error 15100.
- SnapDriveDebug.log shows:
Backup of the Dataset Name: test
Backup id: f26d8349-53c5-4578-ba6d-c000000a00a1 failed to execute
Error :Error: Vss Requestor - Backup Components failed.Failed to add volume \\SVM1\SHARE1\ to snapshot set. The shadow copy provider had an unexpected error while trying to process the specified operation.
- Third Party Backup software's requesting a VSS Backup of a Hyper-V VM hosted on a SMB3 cifs share fails
From the Client Software logs:CVssSnapshotSetObject::AddToSnapshotSet() Unexpected error calling a provider routine: BeginPrepareSnapshot({12345678-1234-1234-1234-1234567890ab},{123456789-1234-1234-1234-1234567890ab},\\Server1\Share1\) [hr = 0x800106be] Provider ID = {12345678-1234-1234-1234-1234567890ab}.
From the Ontap MGWD log :00000018.0041f6b7 071ebc54 Thu Mar 25 2021 14:28:47 +00:00 [kern_mgwd:info:2177] 0x83d4ddb00: 0: ERR: tables::cifs_shadowcopy: sc_startSCS:src/tables/cifs/cifs_shadowcopy.cc:1853 sc_startSCS(vserverId=6, autorecover=false, clientScsetId=7af6ffa5-a735-48ae-87da-41f0ac6fa90d) failed: StartShadowCopySet: reached the maximum number of shadow copy operations per vserver
00000018.0041f6b8 071ebc54 Thu Mar 25 2021 14:28:47 +00:00 [user_mgwd:error] processOp:src/mgmtgwd/vss_handler.cc:299 Error 7702
00000018.0041f6b9 071ebc54 Thu Mar 25 2021 14:28:47 +00:00 [kern_mgwd:info:2177] 0x83d4ddb00: 0: ERR: tables::cifs_shadowcopy: sc_startSCS:src/tables/cifs/cifs_shadowcopy.cc:1879 sc_startSCS() failed