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SnapManager for Hyper-V

Deleted SnapInfo Snapshot copies

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  • Issue

    SnapManager for Hyper-V is not maintaining or deleting SnapInfo Snapshot copies.

  • Cause

    After creating a dataset backup, SnapManager for Hyper-V creates a Snapshot copy of the SnapInfo LUN. SnapInfo Snapshot copies are not deleted if the backup is deleted. By default, SnapManager for Hyper-V retains 30 SnapInfo LUN Snapshot copies, replacing the oldest copy with the newest copy each time the newest copy exceeds the 30-copy threshold.

  • Corrective action

    You can configure the number of SnapInfo Snapshot copies you want to retain for each Hyper-V host by using one of the following registry keys:

    For stand-alone Hyper-V hosts: key:

    HKLM\SOFTWARE\NetApp\SnapManager for Hyper-V\Server\<hostname> DWORD value: snapinfo_snaps_count (number of SnapInfo Snapshot copies to be retained)

    For clustered Hyper-V hosts (to be configured on each node in the cluster): key:

    HKLM\Cluster\SOFTWARE\NetApp\SnapManager for Hyper-V\Server\<clustername> DWORD value: snapinfo_snaps_count (number of SnapInfo Snapshot copies to be retained)