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Veeam Backup of Windows VM fails during Shadow copies commit due to background write handling

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Category:
ontap-9
Specialty:
perf
Last Updated:

Applies to

  • ONTAP 9
  • AFF (can apply to FAS too)
  • Veeam Backups
  • Windows Server Virtual Machine

Issue

  • Veeam backups fail in the logs when creating a clone volume with the following error:
12/30/2021 2:05:38 PM :: Creating VSS snapshot Error: Failed to create snapshot: Backup job failed.
Cannot create a shadow copy of the volumes containing writer's data.
VSS asynchronous operation is not completed. Operation: [Shadow copies commit]. Code: [0x8004230f].
  • The API job is seen here taking 37 seconds in the ONTAP /mroot/etc/log/mlog/audit.log log files:
00000025.01d482ad 0d8f0c9c Thu Dec 30 2021 14:05:55 -05:00 [kern_audit:info:2041] Cluster1:ontapi :: :: ::
<netapp version='1.15' xmlns='http://www.netapp.com/filer/admin' vfiler='svm1' nmsdk_version='9.3'
nmsdk_platform='Windows Server 2016 Datacenter AMD64' nmsdk_language='DotNet' nmsdk_app='VeeamBR 11.0.0'>
<volume-clone-create><parent-volume>vol1</parent-volume>
<volume>VeeamAUX_vol1_6DXe50gk6lSt9AqpWocOZF</volume>
<space-reserve>none</space-reserve>
<parent-snapshot>VeeamAUX_vol1_5rcA4Js3uQF5CXgqFmlJ0l</parent-snapshot></volume-clone-create></netapp>  :: Pending:

00000025.01d48395 0d8f0c9d Thu Dec 30 2021 14:06:32 -05:00 [kern_audit:info:2041] 8503e9000544810e ::
Cluster1:ontapi ::  ::  :: volume-clone-create :: Success:
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